Ames Climate by Month
Ames, Iowa, United States
Warm summers and freezing winters, with rain spread through the year.
Warm summers and freezing winters, with rain spread through the year: that's Ames's climate in short. July is the warmest month, with highs around 85°F (30°C); January is the coolest at 29°F (-2°C), and nights dip to 11°F (-12°C). It gets 34 in (859 mm) of rain a year, spread across the months.
- Warmest month
- 85°F(30°C)
- Average high, July
- Coldest nights
- 11°F(-12°C)
- Average low, January
- Rain per year
- 34 in(859 mm)
- No clear rainy season
- Humidity
- 74%
- Sunniest: July
Best and worst months in Ames
Best for weatherThe most comfortable weather comes in September, with highs around 77°F (25°C) and about 3.2 in (82 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 29°F (-2°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 September.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Ames weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 29°F(-2°C) | 11°F(-12°C) | 0.8 in(20 mm) | 81% | 1.6 |
| FebFebruary | 34°F(1°C) | 15°F(-9°C) | 1.1 in(28 mm) | 88% | 2.5 |
| MarMarch | 48°F(9°C) | 27°F(-3°C) | 2.0 in(50 mm) | 66% | 3.7 |
| AprApril | 61°F(16°C) | 38°F(4°C) | 3.8 in(96 mm) | 66% | 4.5 |
| MayMay | 73°F(23°C) | 50°F(10°C) | 4.5 in(114 mm) | 65% | 5.3 |
| JunJune | 82°F(28°C) | 60°F(15°C) | 5.5 in(140 mm) | 70% | 6.0 |
| JulJuly | 85°F(30°C) | 64°F(18°C) | 3.6 in(92 mm) | 76% | 6.1 |
| AugAugust | 83°F(28°C) | 61°F(16°C) | 3.8 in(97 mm) | 78% | 5.4 |
| SepSeptemberBest | 77°F(25°C) | 53°F(11°C) | 3.2 in(82 mm) | 67% | 4.5 |
| OctOctober | 64°F(18°C) | 40°F(5°C) | 2.8 in(70 mm) | 68% | 2.9 |
| NovNovember | 47°F(9°C) | 28°F(-2°C) | 1.4 in(36 mm) | 79% | 1.8 |
| DecDecember | 34°F(1°C) | 17°F(-8°C) | 1.3 in(34 mm) | 86% | 1.4 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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