Rantoul, United States experiences average highs of 17°C (63°F) and lows of 8°C (46°F) throughout the year. Rainfall is moderate, averaging about 10 rainy days per month. Average highs have stayed broadly stable across the available records.
Rantoul, United States Weather & Climate 2026
Monthly climate averages for Rantoul, United States. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: Mar–Aug At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
5.5/10
Best: May, June, July, August, September
UV Index
5
Low
Temperature 17°C / 8°C
Feels Like 16°C / 5°C
Rainy Days 10
Rainfall 87 mm
Sunshine 8 h
Humidity 68%
Wind Speed 21 km/h
Dew Point 7°C
Snow Days 4 days
Frost Days 16 days
Hottest Month
29°C
July
Avg Low20°C
Rain11days
Coldest Month
-6°C
January
Avg High2°C
Rain9days
Driest Month
8days
February
Avg High6°C
Avg Low-4°C
Windiest Month
25 km/h
April (Gusts 48)
Worst Time to Visit
Consider avoiding January, February, December due to very cold temperatures.
Sun Position
Sunrise 05:24
Daylight 15h
Sunset 20:25
Live conditions—
Rantoul on the map · live conditions
Rantoul, United States
- Continent
- Americas
- Country
- United States
- City
- Rantoul
- Population
- 13K
- Elevation
- 227 m
- Coordinates
- 40.31°, -88.16°
Seasonal Breakdown
Spring
Mar–May
Avg High 18°C
Avg Low 7°C
Rain 12 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 29°C
Avg Low 19°C
Rain 10 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 19°C
Avg Low 10°C
Rain 8 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 5°C
Avg Low -4°C
Rain 9 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 2°C / -6°C . Feb: 6°C / -4°C . Mar: 12°C / 2°C . Apr: 17°C / 6°C . May: 23°C / 13°C . Jun: 28°C / 18°C . Jul: 29°C / 20°C . Aug: 28°C / 19°C . Sep: 26°C / 16°C . Oct: 19°C / 10°C . Nov: 11°C / 2°C . Dec: 6°C / -2°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 67 mm. Feb: 66 mm. Mar: 109 mm. Apr: 120 mm. May: 115 mm. Jun: 96 mm. Jul: 97 mm. Aug: 86 mm. Sep: 70 mm. Oct: 90 mm. Nov: 63 mm. Dec: 61 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 71%. Feb: 69%. Mar: 65%. Apr: 64%. May: 68%. Jun: 66%. Jul: 73%. Aug: 72%. Sep: 67%. Oct: 65%. Nov: 68%. Dec: 71%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 23 km/h . Feb: 23 km/h . Mar: 25 km/h . Apr: 25 km/h . May: 21 km/h . Jun: 20 km/h . Jul: 17 km/h . Aug: 17 km/h . Sep: 18 km/h . Oct: 22 km/h . Nov: 22 km/h . Dec: 22 km/h .
Sunshine
Sunshine
Sunshine: Jan: 5h. Feb: 7h. Mar: 8h. Apr: 9h. May: 10h. Jun: 12h. Jul: 12h. Aug: 11h. Sep: 10h. Oct: 8h. Nov: 6h. Dec: 5h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 4. Mar: UV 5. Apr: UV 6. May: UV 7. Jun: UV 7. Jul: UV 7. Aug: UV 7. Sep: UV 6. Oct: UV 4. Nov: UV 3. Dec: UV 2.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 8 days. Feb: 7 days. Mar: 3 days. Apr: 1 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 2 days. Dec: 4 days.
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending drier by about 14 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 30°C | Jul · 29°C |
| Coldest month | Jan 2025 · -9°C | Jan · -6°C |
| Wettest month | Jul 2025 · 109 mm | Apr · 120 mm |
| Windiest month | Mar 2025 · 27 km/h | Apr · 25 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Fair May best
Excellent June best
Excellent July best
Good August best
Excellent September best
Excellent October
Good November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 2°C / -6°C | -2°C / -11°C | 9days (67 mm) Wet | 5.1h Fair | 71% Muggy | 2.4 Moderate | Poor | View Details |
| February | 6°C / -4°C | 1°C / -9°C | 8days (66 mm) Wet | 6.8h Fair | 69% Muggy | 3.6 Moderate | Poor | View Details |
| March | 12°C / 2°C | 9°C / -3°C | 11days (109 mm) Wet | 7.5h Good | 65% Muggy | 4.8 Moderate | Poor | View Details |
| April | 17°C / 6°C | 15°C / 3°C | 12days (120 mm) Wet | 8.8h Good | 64% Muggy | 5.6 High | Fair | View Details |
| May best | 23°C / 13°C | 23°C / 11°C | 13days (115 mm) Wet | 10h Excellent | 68% Muggy | 6.7 High | Excellent | View Details |
| June best | 28°C / 18°C | 30°C / 18°C | 10days (96 mm) Wet | 11.7h Excellent | 66% Muggy | 7.2 Very High | Excellent | View Details |
| July best | 29°C / 20°C | 32°C / 21°C | 11days (97 mm) Wet | 11.9h Excellent | 73% Muggy | 7.2 Very High | Good | View Details |
| August best | 28°C / 19°C | 31°C / 20°C | 10days (86 mm) Wet | 11h Excellent | 72% Muggy | 6.8 High | Excellent | View Details |
| September best | 26°C / 16°C | 27°C / 16°C | 8days (70 mm) Wet | 9.8h Good | 67% Muggy | 5.5 High | Excellent | View Details |
| October | 19°C / 10°C | 17°C / 7°C | 9days (90 mm) Wet | 7.5h Good | 65% Muggy | 4.2 Moderate | Good | View Details |
| November | 11°C / 2°C | 7°C / -2°C | 8days (63 mm) Wet | 6.4h Fair | 68% Muggy | 2.8 Moderate | Poor | View Details |
| December | 6°C / -2°C | 1°C / -7°C | 9days (61 mm) Wet | 5.3h Fair | 71% Muggy | 2.1 Moderate | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Rantoul are May, June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Rantoul, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Rantoul is July, with average daytime highs of 29°C (84°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Rantoul is January, with average overnight lows of -6°C (22°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Rantoul is April, averaging 120mm of precipitation across 12 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Rantoul runs through May, April, March, July, with the heaviest rainfall in May. Based on 10-year averages for Rantoul.
Rantoul receives approximately 102 sunshine hours per year. The sunniest month is July with around 12 hours. Based on climate data for Rantoul.
The least favorable months to visit Rantoul are January, February, December, primarily due to very cold temperatures. For the best conditions, consider May, June, July, August, September instead.
The annual average UV index in Rantoul is 5, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Rantoul is 68%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Rantoul receives snow. Months with snowfall average 4 snow days and 7 cm (3 in) of accumulation, with about 16 frost days during winter.
Average wind speeds in Rantoul are 21 km/h (13 mph). The windiest month is April with peak winds reaching 25 km/h (15 mph) (gusts up to 48 km/h / 30 mph).
Rantoul averages 5 clear-sky days per month with overall cloud cover around 58%. The clearest skies occur in September.
The annual average dew point in Rantoul is 7°C (45°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Rantoul has a Humid Subtropical climate, classified as Cfa under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Rantoul ranges from 5°C (41°F) to 16°C (61°F) on average. Wind chill makes winters feel noticeably colder than the actual temperature — layered clothing is recommended.
Yes, June is a great time to visit Rantoul. It earns a climate score of 8.7/10 with Excellent.
For June in Rantoul, pack Umbrella, Waterproof jacket, Breathable clothing, Sunscreen (SPF 30+), Sun hat. With average highs of 28°C (83°F) and 10 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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