Decatur, Alabama Climate by Month
Decatur, Alabama, United States
Hot summers and cool winters, with rain spread through the year.
Hot summers and cool winters, with rain spread through the year: that's Decatur's climate in short. August is the warmest month, with highs around 91°F (33°C); January is the coolest at 52°F (11°C), and nights dip to 32°F (0°C). About 58 in (1475 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 91°F(33°C)
- Average high, August
- Coldest nights
- 32°F(0°C)
- Average low, January
- Rain per year
- 58 in(1475 mm)
- No clear rainy season
- Humidity
- 69%
- Sunniest: July
Best and worst months in Decatur
Best for weatherOctober is the best time for weather in Decatur: highs near 75°F (24°C) and about 3.3 in (84 mm) of rain a month.
Least pleasantDecember and January are the least pleasant; January is the coldest, with highs of only 52°F (11°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in October.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Decatur weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 52°F(11°C) | 32°F(0°C) | 5.0 in(128 mm) | 78% | 2.2 |
| FebFebruary | 56°F(14°C) | 35°F(2°C) | 5.1 in(129 mm) | 67% | 2.9 |
| MarMarch | 65°F(18°C) | 42°F(5°C) | 6.0 in(152 mm) | 65% | 4.0 |
| AprApril | 74°F(23°C) | 49°F(10°C) | 5.5 in(139 mm) | 64% | 5.1 |
| MayMay | 82°F(28°C) | 58°F(15°C) | 4.6 in(116 mm) | 68% | 5.9 |
| JunJune | 88°F(31°C) | 66°F(19°C) | 5.0 in(128 mm) | 69% | 5.9 |
| JulJuly | 91°F(33°C) | 69°F(21°C) | 5.0 in(127 mm) | 72% | 6.1 |
| AugAugust | 91°F(33°C) | 68°F(20°C) | 3.5 in(90 mm) | 70% | 5.7 |
| SepSeptember | 86°F(30°C) | 62°F(17°C) | 4.2 in(106 mm) | 67% | 4.9 |
| OctOctoberBest | 75°F(24°C) | 50°F(10°C) | 3.3 in(84 mm) | 67% | 3.6 |
| NovNovember | 64°F(18°C) | 40°F(4°C) | 4.3 in(109 mm) | 69% | 2.6 |
| DecDecember | 54°F(12°C) | 34°F(1°C) | 6.6 in(167 mm) | 72% | 2.0 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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