Decatur weather by month & the best time to visit
🇺🇸 United States · small town · hot-summer continental climate
The best time to visit Decatur is August — its sunniest month (Sunshine Score 77/100), with September and July close behind. Decatur averages about 2,248 hours of sunshine a year. Daytime highs around 29°C / 84°F and roughly 84 mm of rain in August.
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- Sun hours / year
- 2,248
- Sunniest month
- August
- Peak score
- 77/100
- Rain / year
- 1,016 mm
- Snow / year
- ≈1 m
- Midday UV at peak
- 8 (very high)
- Population
- 73k
- Elevation
- 204 m
When is the best time to visit Decatur?
For sunshine, the best time to visit Decatur is August, then September and July. The dullest month is January (0/100, 57 mm of rain). The full month-by-month picture is in the table below.
How sunny is Decatur?
Decatur gets a moderate 2,248 hours of sunshine a year. 77 Sunshine Score points separate August (77) from January (0), so the month you pick matters. It ranks #305 of 580 destinations in United States for annual sunshine, below the national median of 2,279 hours. The year's 1,016 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV |
|---|---|---|---|---|---|
| January | 0 | 1° / 34°F | -8° / 18°F | 57 mm | 1 |
| February | 0 | 3° / 37°F | -7° / 19°F | 56 mm | 2 |
| March | 20 | 11° / 52°F | -1° / 30°F | 70 mm | 4 |
| April | 61 | 18° / 64°F | 5° / 41°F | 104 mm | 5 |
| May | 71 | 23° / 73°F | 12° / 54°F | 115 mm | 6 |
| June | 70 | 28° / 82°F | 17° / 63°F | 120 mm | 8 |
| July | 74 | 29° / 84°F | 19° / 66°F | 99 mm | 8 |
| August | 77 | 29° / 84°F | 18° / 64°F | 84 mm | 7 |
| September | 77 | 26° / 79°F | 14° / 57°F | 82 mm | 6 |
| October | 62 | 18° / 64°F | 6° / 43°F | 94 mm | 4 |
| November | 20 | 11° / 52°F | 0° / 32°F | 71 mm | 2 |
| December | 0 | 4° / 39°F | -5° / 23°F | 64 mm | 1 |
See Decatur on the interactive sunshine globe →
Nearby places for sunshine
- Bloomington/Normal United States · 72 km · best in Sep · 2,243 h sun/yr
- Peoria United States · 116 km · best in Sep · 2,293 h sun/yr
- Belleville United States · 166 km · best in Sep · 2,312 h sun/yr
- St Louis United States · 177 km · best in Sep · 2,316 h sun/yr
- Indianapolis United States · 220 km · best in Sep · 2,168 h sun/yr
- Moline United States · 227 km · best in Sep · 2,290 h sun/yr
Nearest destinations
- Savoy United States · 55 km · 2,242 h sun/yr · best in Sep
- West Lafayette United States · 176 km · 2,188 h sun/yr · best in Sep
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