Alpharetta Climate by Month
Alpharetta, Georgia, United States
Hot summers and cool winters, with rain spread through the year.
The climate in Alpharetta is one of hot summers and cool winters, with rain spread through the year. July is the warmest month, with highs around 89°F (32°C); January is the coolest at 52°F (11°C), and nights dip to 33°F (1°C). It gets 55 in (1405 mm) of rain a year, spread across the months.
- Warmest month
- 89°F(32°C)
- Average high, July
- Coldest nights
- 33°F(1°C)
- Average low, January
- Rain per year
- 55 in(1405 mm)
- No clear rainy season
- Humidity
- 66%
- Sunniest: July
Best and worst months in Alpharetta
Best for weatherApril and October are the best time for weather in Alpharetta: highs near 74°F (23°C) and about 4.2 in (106 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)
Alpharetta weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 52°F(11°C) | 33°F(1°C) | 5.1 in(130 mm) | 65% | 2.4 |
| FebFebruary | 57°F(14°C) | 37°F(3°C) | 5.3 in(134 mm) | 64% | 3.0 |
| MarMarch | 65°F(18°C) | 43°F(6°C) | 5.7 in(146 mm) | 56% | 4.2 |
| AprAprilBest | 74°F(23°C) | 50°F(10°C) | 4.7 in(120 mm) | 58% | 5.1 |
| MayMay | 81°F(27°C) | 59°F(15°C) | 3.9 in(100 mm) | 64% | 6.0 |
| JunJune | 87°F(30°C) | 66°F(19°C) | 4.3 in(109 mm) | 68% | 5.8 |
| JulJuly | 89°F(32°C) | 70°F(21°C) | 4.7 in(119 mm) | 70% | 6.0 |
| AugAugust | 88°F(31°C) | 69°F(21°C) | 4.4 in(113 mm) | 69% | 5.5 |
| SepSeptember | 83°F(28°C) | 63°F(17°C) | 4.1 in(103 mm) | 69% | 4.6 |
| OctOctoberBest | 74°F(23°C) | 52°F(11°C) | 3.6 in(91 mm) | 67% | 3.6 |
| NovNovember | 63°F(17°C) | 41°F(5°C) | 3.9 in(100 mm) | 68% | 2.7 |
| DecDecember | 54°F(12°C) | 35°F(2°C) | 5.5 in(140 mm) | 69% | 2.2 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
Places with a similar climate outside the United States
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