When you think of fall, you might picture cooler air and changing leaves, but Singapore tells a different story. This city-state sits close to the equator, so it stays warm and humid all year.
In fall, daily highs hover around 87°F (31°C), with lows near 78°F (25°C), and the humidity barely lets up.
Cloud cover thickens as fall goes on, and rain picks up thanks to the monsoon influence. Days stick close to 12 hours long, so you won’t see big daylight swings, but you’ll definitely notice the uptick in wet weather.
If you’re planning to visit or just curious about Singapore’s fall climate, it helps to know what to expect. Whether you’re packing for outdoor adventures or prepping for rain, this guide covers temperatures, rainfall, daylight, and some travel tips.
Overview of Singapore’s Fall Climate
During fall, Singapore stays steadily warm, very humid, and gets a lot of rain. Temperatures barely budge, but cloud cover and precipitation creep up as the months pass.
The city’s spot near the equator shapes all of this.
Geographical Location and Climate Zone
Singapore sits just above the equator, at about 1.3°N latitude. This puts it squarely in the tropical rainforest climate category, according to Köppen-Geiger.
You won’t get four distinct seasons here like you would in temperate places. Instead, it’s warm and humid all year, with only minor changes in rainfall and wind.
The island is surrounded by the South China Sea and other waters, which help keep temperatures pretty steady. Average highs during fall stick close to 87°F (31°C), and lows hang around 78°F (25°C).
Humidity? It’s high all the time, often nearing 100% muggy conditions. That means you’ll feel the dampness day and night, no matter what. This warm, heavy air is just part of life in Singapore.
Seasonal Weather Patterns
As fall rolls in, you notice some changes. Skies become more overcast or mostly cloudy—sometimes more than 85–90% of the time. You still get about the same amount of sunshine, but clouds or haze often filter it.
Rainfall ramps up fast. In September, you get about 5 inches of rain, but by November, that jumps to 10 inches. Short, heavy showers happen a lot, especially in the afternoon.
Day length barely shifts—still around 12 hours—so you won’t see much change there. Winds stay gentle, about 6–7 mph, but they do switch direction, blowing from the south in September and from the north by late November.
All this adds up to a wetter fall, with regular showers and that signature humid air you can’t escape.
Influence of the Equator
Singapore’s climate really feels the impact of its equatorial position. Solar energy stays steady all year, so temperatures don’t swing much.
Unlike places farther from the equator, you don’t see big seasonal jumps in heat or daylight. The sun rises and sets at almost the same time every day, with just a few minutes of difference month to month.
The equator pumps up the humidity, too. Warm ocean waters around the island evaporate quickly, loading the air with moisture. That’s why muggy conditions last all year, including fall.
Convectional rainfall is also a thing here. Warm air shoots upward, building tall clouds that dump heavy rain. That’s why those sudden, intense afternoon downpours happen so often.
If you live here or just visit, you can’t really miss how the equator shapes Singapore’s humid, rainy climate.
Typical Fall Temperatures in Singapore
Singapore’s fall season stays warm and sticky, thanks to its tropical climate. Temperatures barely budge from day to night, and even from month to month, changes are small compared to other places.
Average Daytime and Nighttime Temperatures
During fall, daytime highs usually hit around 87°F (31°C). It’s rare for them to dip below 83°F (28°C) or climb above 91°F (33°C). Early October often brings the warmest days, peaking near 88°F (31°C).
Nights stay mild, averaging about 78°F (26°C). Sometimes it cools to 75°F (24°C), but warmer nights can sit closer to 80°F (27°C).
Thanks to the humidity, evenings don’t really cool off. Unlike places where nights bring relief, Singapore’s tropical air keeps things warm and heavy all the time.
| Time of Day | Average Temperature | Range |
|---|---|---|
| Daytime High | ~87°F (31°C) | 83–91°F (28–33°C) |
| Nighttime Low | ~78°F (26°C) | 75–80°F (24–27°C) |
Temperature Variation Through the Fall Months
Temperatures don’t change much between September, October, and November. Early fall feels just a touch warmer, with October usually topping the charts. By late November, daytime highs stick to about 86–87°F (30–31°C)—not much cooling at all.
Daily highs and lows only differ by about 8–10°F (4–5°C). That small swing comes from the island’s equatorial spot, where the sun and ocean keep things steady.
You won’t get those sharp monthly shifts like in temperate places. Singapore’s tropical climate means you can count on steady warmth whenever you show up in the fall.
Rainfall and Humidity During Fall
Singapore’s fall weather stays hot and humid, with lots of showers and storms. Rain picks up toward the end of fall as the northeast monsoon shows up, and humidity stays high, affecting how comfortable you feel outside.
Monthly Rainfall Totals
Rainfall in fall changes month by month. September usually brings moderate rain, with about 170–200 mm. October gets a bit wetter, averaging 180–220 mm. By November, rainfall jumps, often topping 250 mm as the wet season ramps up.
November is the wettest fall month. Showers are heavy but usually short, though thunderstorms can drag out longer. If you’re spending time outdoors in late fall, expect rain to be part of your plans.
| Month | Average Rainfall (mm) | Notes |
|---|---|---|
| September | 170–200 | Moderate showers |
| October | 180–220 | More frequent rain |
| November | 250+ | Peak wet season |
Humidity Levels and Their Effects
Humidity doesn’t really take a break in Singapore, and fall is no different. Average relative humidity usually sits between 75% and 85%, and mornings can feel especially damp.
Even on drier days, the air rarely feels dry because tropical moisture is always hanging around.
High humidity makes it tough for sweat to evaporate, so you may feel sticky even when you’re not moving much. Air conditioning indoors helps, but outside, the breeze doesn’t do much.
This level of moisture also means mold and mildew can pop up fast in closed spaces. If you’re staying a while, you might want to keep rooms aired out or use a dehumidifier. Most travelers find that light, breathable clothes work best.
Rainy Days and Weather Events
Rain falls pretty often in fall, and the number of rainy days goes up as the season moves along. September averages about 13–15 wet days, October sees 15–17, and November can hit 18–20 days with rain.
Most rain comes as quick, intense showers, usually in the afternoon. Thunderstorms pop up a lot, sometimes bringing strong winds and lightning. These storms can mess up outdoor plans but usually clear out in a few hours.
By November, the northeast monsoon starts to affect the weather. You get longer-lasting rains and cloudier skies. Flooding is pretty rare, but after heavy downpours, some streets might see water pile up, so keep your travel plans flexible.
Monsoon Influence on Fall Weather
Singapore’s fall weather reflects a shift between the two main monsoon systems. Rainfall patterns, wind directions, and thunderstorm activity all change, which is why you notice more unsettled skies and sudden heavy rain.
Transition Between Southwest and Northeast Monsoon
In fall, Singapore shifts from the Southwest Monsoon (June–September) to the Northeast Monsoon (December–March). This change happens in October and November, during what’s called the inter-monsoon season.
Winds turn light and unpredictable, often shaped by land and sea breezes. Mornings can feel calm, but afternoons heat up fast, sparking thunderstorms. More clouds roll in, so skies look grayer than before.
Rainfall rises in October and November. You can expect 15–19 rain days per month, and totals often go over 160–250 mm. Humidity stays high, usually above 80%, making the air feel even warmer.
This time of year feels less predictable. You might get sunny mornings, then heavy rain by afternoon. Packing light clothes and an umbrella or rain jacket makes sense.
Impact of Monsoon Surges and Thunderstorms
As the Northeast Monsoon nears, you might get hit by monsoon surges—strong winds that bring hours or even days of rain. While these show up more from December to January, early surges can pop up in late November.
Thunderstorms remain super common in fall. Afternoon and evening storms form when the ground heats up and sea breezes push in moist air. These storms hit hard but usually don’t last long—expect heavy rain and some gusty winds.
There’s also the Sumatra squall, a line of thunderstorms that rolls in from Sumatra, usually early in the morning. These can bring sudden wind gusts up to 40–80 km/h. They’re not as common as afternoon storms, but they can still mess with outdoor plans or early commutes.
During heavy rain or haze, visibility drops, especially at the end of the Southwest Monsoon. But things usually clear up quickly after a downpour, leaving the air cooler and fresher.
Sunshine, Daylight, and UV Index in Fall
In Singapore’s fall months, you get steady daylight, moderate sunshine, and high UV levels. These factors all affect how much time you want to spend outside and how you should prep for the strong tropical sun.
Average Sunshine Hours
Singapore gets about 5 to 6 hours of sunshine per day on average during fall. September is usually a bit sunnier, but October and November bring more clouds and rain.
Rainy season kicks off in October and peaks in November. More rain means fewer clear days, so sunshine is often broken up by storms.
Still, you get enough sun for outdoor activities. The mix of heat and humidity can make the sun feel stronger than the numbers suggest, though.
| Month | Avg. Sunshine (hrs/day) | Conditions |
|---|---|---|
| September | ~5.5–6.0 | Warm, fewer storms |
| October | ~5.0–5.5 | Rain increases |
| November | ~4.5–5.0 | Wettest, cloudiest |
Daylight Duration
Singapore sits almost right on the equator, so daylight hours barely change all year. In fall, you’ll get about 12 hours of daylight each day—the difference between months is just a few minutes.
Sunrise and sunset times hardly budge. The sun comes up around 7:00 AM and goes down close to 7:00 PM.
Travelers find this predictability handy for planning. You won’t need to tweak your schedule for changing day lengths like you would in places farther from the equator.
UV Index Trends
Singapore’s UV index stays consistently high all year, even in fall. At midday, levels often hit 10 or higher, which lands in the “very high” to “extreme” range.
Clouds and rain in October and November may block some direct sunlight, but UV rays still get through. Even when it’s cloudy, you can’t really escape strong ultraviolet exposure.
If you’re outside for a while, definitely use sunscreen, sunglasses, and protective clothing. Shade helps, and don’t forget to hydrate, especially around midday when the sun feels relentless.
Wind and Atmospheric Conditions in Autumn
You’ll notice steady tropical air patterns with only minor seasonal shifts. Winds stay light to moderate, and while there’s plenty of cloud cover and rain, pressure and visibility don’t change much.
Prevailing Winds and Gusts
In autumn, Singapore’s winds usually come from the southwest or southeast, depending on the monsoon transition. As September approaches, the southwest monsoon weakens and calmer inter-monsoon conditions take over.
This change brings more variable wind directions and gentler breezes.
Average wind speeds hover around 6–10 km/h (4–6 mph). Strong gusts don’t happen often, but you might feel quick bursts during afternoon thunderstorms.
These gusts can reach 30–40 km/h (19–25 mph) when heavy rain moves in fast.
Because Singapore is so close to the equator, you won’t see big seasonal wind changes like in temperate places. The atmosphere stays pretty steady, with just small daily ups and downs.
If you’re planning something outside, expect calm mornings, breezier afternoons, and the occasional sudden gust when storms roll through.
Air Pressure and Visibility
Air pressure in Singapore holds steady in autumn, averaging 1008–1012 mb. You won’t see big swings, so there aren’t sharp weather changes from pressure systems like you’d get farther north.
Local convection and rainfall patterns shape the daily weather instead.
Visibility depends on how much it rains and how cloudy it gets. On clear days, you can see 8–10 km ahead.
Heavy showers can quickly cut that down to just a few kilometers. During the inter-monsoon period, haze from regional forest fires sometimes drifts in and lowers visibility even more, though it’s not the same every year.
Humidity usually stays high—often above 80%—so the air feels heavy and sticky. With so many cloudy days, the atmosphere stays moist and dense.
If you’re outside, expect shorter bouts of low visibility when storms or haze hit.
Travel Tips for Experiencing Fall in Singapore
Fall in Singapore brings warm days, high humidity, and frequent showers. If you plan your activities and pack smart, you’ll stay comfortable and make the most of your trip.
Best Activities for Fall Weather
Rain showers happen a lot from October to November, so it’s smart to pick both indoor and outdoor options. Museums, aquariums, and shopping centers offer air-conditioning and shelter when sudden downpours hit.
For outdoor fun, mornings and evenings work best since it’s a bit cooler, with temperatures between 78–87°F (25–31°C). Parks like Gardens by the Bay or the Botanic Gardens are nice for short walks before the heat ramps up.
You can check out themed cafés like Cafe Kreams, which brings autumn vibes indoors. Want a glimpse of fall color? Sea almond trees drop their leaves around this time, which is about as close as you’ll get.
Night markets and hawker centers get busy after sunset, when the humidity finally lets up a bit. If you carry an umbrella or a lightweight rain jacket, you’ll get around easily when showers pop up.
What to Pack for the Season
You’ll want to toss in light, breathable clothes, since humidity usually hovers around 80 to 100% most days. Cotton or linen shirts, shorts, and dresses feel way cooler than anything synthetic.
Honestly, a small umbrella works better than dragging around a heavy raincoat, since showers tend to be quick but frequent. Quick-dry shoes or sandals will save you from soggy feet when the streets get wet.
Don’t forget sunscreen and a hat if you plan to be outside, because the UV levels stay high, even when it’s cloudy. A reusable water bottle comes in handy—you’ll probably sweat more than you expect.
If you’re heading out in the evening and know you’ll be indoors, you might want a light sweater or shawl, since air conditioning can get chilly.
Here’s a simple packing list:
- Clothing: light tops, shorts, casual dresses
- Rain gear: compact umbrella, quick-dry shoes
- Extras: sunscreen, hat, refillable water bottle, light sweater