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.
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 |
Nearest destinations
Decatur: questions and answers
What kind of destination is Decatur?
Decatur is a small town in United States with a hot-summer continental climate.
How many hours of sunshine does Decatur get a year?
Decatur gets about 2,248 hours of sunshine a year, at its best around August.
When is the best time to visit Decatur?
The sunniest time to visit Decatur is August, when the Sunshine Score peaks at 77/100 (with September and July close behind). Expect daytime highs around 29°C / 84°F.
What is the least sunny month in Decatur?
January is the least sunny month in Decatur, scoring 0/100 with about 57 mm of rain.
How strong is the sun in Decatur?
The typical midday UV index in Decatur peaks around 8 (very high) in June, easing to about 1 (low) in January. Month-by-month midday UV values are in the UV column of the table on this page.
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