Twin Falls Climate by Month
Twin Falls, Idaho, United States
Hot summers and cold winters, with little rain.
Twin Falls has hot summers and cold winters, with little rain. July is the warmest month, with highs around 91°F (33°C); January is the coolest at 39°F (4°C), and nights dip to 22°F (-6°C). It gets only 8.9 in (226 mm) of rain a year. July and August are almost completely dry.
- Warmest month
- 91°F(33°C)
- Average high, July
- Coldest nights
- 22°F(-6°C)
- Average low, December
- Rain per year
- 8.9 in(226 mm)
- No clear rainy season
- Humidity
- 51%
- Sunniest: July
Best and worst months in Twin Falls
Best for weatherThe most comfortable weather comes in May, June and September, with highs around 77°F (25°C) and about 0.8 in (19 mm) of rain a month.
Least pleasantDecember and January are the least pleasant; January is the coldest, with highs of only 39°F (4°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)
Twin Falls weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 39°F(4°C) | 23°F(-5°C) | 1.1 in(27 mm) | 69% | 1.6 |
| FebFebruary | 44°F(7°C) | 25°F(-4°C) | 0.7 in(18 mm) | 74% | 2.7 |
| MarMarch | 55°F(13°C) | 31°F(0°C) | 0.9 in(23 mm) | 53% | 4.2 |
| AprApril | 62°F(17°C) | 36°F(2°C) | 0.9 in(23 mm) | 51% | 5.1 |
| MayMayBest | 71°F(22°C) | 43°F(6°C) | 1.1 in(29 mm) | 44% | 6.4 |
| JunJuneBest | 81°F(27°C) | 51°F(10°C) | 0.7 in(17 mm) | 37% | 7.3 |
| JulJuly | 91°F(33°C) | 58°F(14°C) | 0.2 in(4 mm) | 31% | 7.6 |
| AugAugust | 89°F(32°C) | 55°F(13°C) | 0.2 in(5 mm) | 33% | 6.6 |
| SepSeptemberBest | 79°F(26°C) | 46°F(8°C) | 0.5 in(12 mm) | 41% | 5.1 |
| OctOctober | 65°F(18°C) | 36°F(2°C) | 0.7 in(19 mm) | 48% | 3.5 |
| NovNovember | 50°F(10°C) | 27°F(-3°C) | 0.9 in(22 mm) | 63% | 2.1 |
| DecDecember | 39°F(4°C) | 22°F(-6°C) | 1.1 in(27 mm) | 70% | 1.4 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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