Decatur Weather in November (1981–2025)

📍 39.85°N, 88.98°W •
📊

November at a Glance in Decatur

(1981–2025)
Avg High
🔥
10.8°C
Avg Low
❄️
0.2°C
Avg Temp
🌡️
5.5°C
Avg Rain
🌧️
78 mm
Avg Humidity
💧
77%
Avg Wind
🌬️
3.6 m/s
Avg Solar
☀️
2.2
kWh/m²/day
vs Annual
📈
-5.7°C
temp difference
❄️Cool afternoons🥶Freezing mornings☁️Cloudier skies🌧️Wet month💨Breezy💦Humid air

Decatur November Weather Overview

November is one of the cooler months of the year in Decatur, with average highs near 10.8°C and lows around 0.2°C (mean 5.5°C). It is about average for rainfall, averaging 78 mm of rainfall and 77% relative humidity across the period.

Decatur November Temperature History (1981–2025)

Range

November is one of the cooler months of the year in Decatur. Across 45 years of records, the warmest November in Decatur was 2001 — when the month averaged 9.4°C — while the coldest was 2014 at 1.2°C. Typical November days reach 10.8°C with nights near 0.2°C. The long-term trend is warming, about 0.2°C per decade.

1981–1985 vs 2021–2025

Avg Temp5.5°C→6.4°C+0.9°C
Max Temp10.6°C→11.9°C+1.3°C
Min Temp0.4°C→0.9°C+0.5°C

Trend (per decade)

Avg Temp+0.2°C/decade ↗
Max Temp+0.3°C/decade ↗
Min Temp+0.1°C/decade ↗

Distribution of Avg Temp

1.0°C–3.3°C9 yr (20%)
3.3°C–5.5°C11 yr (24%)
5.5°C–7.8°C18 yr (40%)
7.8°C–10.0°C7 yr (16%)

Decatur November Rainfall History (1981–2025)

Range

November is about average for rainfall in Decatur, averaging 78 mm of rainfall. The wettest November on record was 1985 with 200 mm, while the driest was 1999 at 12 mm.

Decatur November Humidity History (1981–2025)

Range

Relative humidity in Decatur during November averages 77%. The most humid November was 1993 at 88%, and the least humid was 1999 at 66%.

Decatur November Solar History (1981–2025)

Range

November receives about 2.2 kWh/m²/day of solar energy in Decatur. The sunniest November was 2023 at 2.8 kWh/m²/day, and the cloudiest was 1992 at 1.1.

Decatur November Wind History (1981–2025)

Range

Average wind speed in Decatur during November is 3.6 m/s. The windiest November was 2011 at 4.5 m/s, while the calmest was 2012 at 2.8 m/s.

What November Feels Like in Decatur

🌅
Freezing
Morning
🌞
Cool
Afternoon
🌆
Cold
Evening
Rain chanceModerate
Outdoor comfort★★☆☆☆

How November Ranks in Decatur

🥶5th coolest month of the year
🌵6th driest month of the year
☀️10th sunniest month of the year

Ranked against the other 11 months using 1981–2025 averages.

Explore Decatur Weather by Month

Decatur November Averages by Decade

Metric1980s1990s2000s2010s2020sChange
Avg Temp5.2°C4.9°C6.1°C5.0°C6.6°C+1.4°C
Avg High10.5°C10.0°C11.3°C10.3°C12.2°C+1.7°C
Avg Low0.0°C-0.3°C1.0°C-0.4°C1.0°C+1°C
Avg Rain100 mm86 mm76 mm68 mm54 mm-47 mm

Extreme November Records in Decatur

🔥Warmest November25.8°C2016
🧊Coldest November-14.1°C1991
🌧️Wettest November200 mm1985
🏜️Driest November12 mm1999
🌬️Windiest November4.5 m/s2011

Key Insights for November

✅

November temperatures in Decatur have risen by about 0.9°C between 1981–1985 and 2021–2025.

✅

November has ranged from a record low of -14.1°C (1991) to a record high of 25.8°C (2016).

✅

Rainfall in November is about average for rainfall, averaging 78 mm, with a wettest year of 200 mm.

Is November a Good Time to Visit Decatur?

A good time to visit Decatur

November is a good time to visit Decatur, with days averaging 10.8°C and nights around 0.2°C (mean 5.5°C, cooler than Decatur's yearly average) and moderate rainfall. June and August are marginally more temperate, but November still suits most travellers.

See Decatur's complete weather history All 12 months side by side, 1981–2025 records, annual trends and long-term averages in one place. View full history →

Decatur Weather in November — In Depth

☀️ November climate overview

November is one of the cooler months of the year in Decatur, with average highs near 10.8°C and lows around 0.2°C (mean 5.5°C). It is about average for rainfall, averaging 78 mm of rainfall and 77% relative humidity across the period.

🌧️ Rain, humidity & wind in November

November averages 78 mm of rainfall in Decatur, about average for rainfall compared with the rest of the year. The wettest November on record saw 200 mm (1985), and the driest just 12 mm (1999). Humidity sits around 77% and average wind speed is 3.6 m/s, with solar radiation averaging 2.2 kWh/m²/day.

📈 How November has changed

Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average November temperatures have risen by about 0.9°C. Daytime highs moved from 10.6°C to 11.9°C and overnight lows from 0.4°C to 0.9°C over the same span.
November Weather in Decatur, Year by Year
🔥 warmest❄️ coldest🌧️ wettest
YearAvg HighAvg TempAvg LowHottest DayColdest DayRainfallHumidityWindSolar
202512.2°C6.6°C1.1°C24.1°C-7.1°C48 mm69%3.5 m/s2.3
202412.8°C7.9°C3.1°C21.3°C-6.7°C106 mm78%3.6 m/s1.9
202312.6°C6.6°C0.6°C24.7°C-8.7°C21 mm70%3.1 m/s2.8
202211.5°C6.1°C0.6°C25.2°C-7.5°C47 mm70%3.8 m/s2.5
202110.2°C4.6°C-1.0°C20.0°C-7.5°C29 mm75%3.4 m/s2.4
202013.9°C7.9°C1.8°C24.5°C-5.6°C72 mm73%3.9 m/s2.5
20197.4°C2.4°C-2.6°C16.0°C-12.8°C55 mm80%3.3 m/s2.2
20186.5°C2.2°C-2.0°C13.7°C-8.0°C71 mm82%3.3 m/s1.9
201711.5°C5.5°C-0.5°C22.6°C-6.7°C66 mm76%3.5 m/s2.3
201613.9°C8.4°C3.0°C25.8°C-5.5°C77 mm78%3.2 m/s2.4
201513.8°C8.1°C2.4°C22.7°C-10.1°C108 mm74%4 m/s2.4
2014 ❄️6.1°C1.2°C-3.7°C18.4°C-12.4°C50 mm78%4 m/s2.1
20139.0°C3.5°C-1.9°C22.4°C-11.5°C47 mm74%3.8 m/s2.4
201210.4°C4.7°C-1.1°C21.8°C-6.9°C32 mm78%2.8 m/s2.5
201113.1°C7.8°C2.5°C22.6°C-6.3°C103 mm75%4.5 m/s2
201011.7°C5.8°C-0.1°C21.7°C-9.2°C74 mm75%3.5 m/s2.3
200912.2°C7.4°C2.6°C21.7°C-3.4°C96 mm87%3.3 m/s2.3
20088.7°C4.3°C-0.1°C21.2°C-7.2°C29 mm79%3.5 m/s2.2
200711.1°C5.5°C-0.2°C20.5°C-6.4°C57 mm71%3.5 m/s2.6
200612.0°C6.6°C1.3°C22.9°C-5.4°C95 mm81%3.4 m/s2
200512.3°C6.7°C1.1°C23.2°C-8.6°C81 mm70%4.3 m/s2.4
200411.8°C6.9°C2.1°C22.0°C-11.4°C131 mm83%3.3 m/s2
200312.8°C7.2°C1.6°C25.7°C-6.5°C109 mm78%3.8 m/s2
20028.9°C4.0°C-0.9°C18.1°C-7.2°C20 mm77%3.6 m/s2.2
2001 🔥15.1°C9.4°C3.6°C21.7°C-4.0°C59 mm78%3.4 m/s2.5
20007.8°C3.1°C-1.6°C24.9°C-10.2°C84 mm77%3.5 m/s2.1
199915.5°C8.9°C2.2°C25.2°C-5.2°C12 mm66%3.3 m/s2.6
199812.4°C7.0°C1.5°C19.7°C-4.9°C62 mm79%3.7 m/s2.2
19978.3°C3.7°C-1.0°C19.8°C-6.6°C98 mm79%3.3 m/s1.8
19966.1°C1.5°C-3.1°C21.0°C-11.5°C89 mm75%3.4 m/s2
19957.7°C1.8°C-4.0°C19.1°C-13.7°C47 mm75%3.9 m/s2.3
199413.0°C7.6°C2.2°C21.5°C-5.3°C120 mm78%4.1 m/s2.2
19937.7°C3.2°C-1.2°C16.5°C-10.5°C89 mm88%3.5 m/s1.9
19928.3°C4.2°C0.1°C18.2°C-5.2°C175 mm86%3.5 m/s1.1
19917.7°C3.0°C-1.6°C21.9°C-14.1°C76 mm80%4.2 m/s2
199013.5°C7.6°C1.6°C23.0°C-5.6°C94 mm78%3.6 m/s2.2
198910.8°C4.9°C-1.0°C22.8°C-8.5°C29 mm69%4.1 m/s2.5
198811.2°C5.3°C-0.6°C19.7°C-6.5°C127 mm77%4.3 m/s2
198712.6°C7.2°C1.8°C25.6°C-6.5°C104 mm70%3.8 m/s2.1
19866.7°C2.1°C-2.4°C17.8°C-12.6°C71 mm84%3 m/s1.7
1985 🌧️10.5°C5.5°C0.6°C20.2°C-6.6°C200 mm85%3.6 m/s1.4
19849.2°C3.9°C-1.4°C19.7°C-6.6°C98 mm79%3.8 m/s2.2
198311.5°C6.4°C1.3°C21.4°C-5.9°C123 mm80%4 m/s—
198210.2°C5.4°C0.5°C21.1°C-9.0°C102 mm80%3.7 m/s—
198111.6°C6.2°C0.9°C21.0°C-6.2°C49 mm81%3 m/s—

Actual recorded November data for each year, 1981–2025 — sourced from NASA POWER.

Other Cities in Illinois

Decatur November Weather — FAQ

What is the average temperature in Decatur in November?▼

The average high in November is around 10.8°C with lows near 0.2°C (mean 5.5°C), based on 45 years of NASA POWER data.

Does it rain a lot in Decatur in November?▼

November averages 78 mm of rainfall in Decatur, about average for rainfall. The wettest on record was 200 mm in 1985.

What was the hottest November on record in Decatur?▼

The hottest November reached 25.8°C in 2016. The coldest dipped to -14.1°C in 1991.

Has November in Decatur gotten warmer over time?▼

Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average November temperatures have risen by about 0.9°C. Daytime highs moved from 10.6°C to 11.9°C and overnight lows from 0.4°C to 0.9°C over the same span.

Is November a good time to visit Decatur?▼

November is one of the cooler months of the year in Decatur and about average for rainfall, so plan for around 10.8°C daytime highs and 0.2°C at night.

Is November the coldest month in Decatur?▼

Not quite — November is the 5th coolest month in Decatur, averaging 5.5°C.

What should I pack for Decatur in November?▼

For November in Decatur, pack warm layers and a jacket for chilly mornings, with typical highs of 10.8°C and lows of 0.2°C. Bring an umbrella or light rain jacket too.

Is Decatur humid in November?▼

Relative humidity in November averages 77% — quite humid.

How windy is Decatur in November?▼

Average wind speed in November is 3.6 m/s. The windiest November on record averaged 4.5 m/s (2011).

Which November had the most rainfall in Decatur?▼

The wettest November on record was 1985 with 200 mm. On average, November sees 78 mm.

Where does this November weather data come from?▼

All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.

Other Illinois cities

Explore how the weather in Decatur behaves each November, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for November specifically, along with year-by-year records and how the month has changed over the decades.