Grand Junction Climate by Month
Grand Junction, Colorado, United States
Very hot summers and cold winters, with little rain.
Grand Junction has very hot summers and cold winters, with little rain. Expect highs of 96°F (36°C) in July and 40°F (5°C) in January, with the coldest nights (January) near 17°F (-8°C). It gets only 7.7 in (195 mm) of rain a year. The air is dry, averaging 45% relative humidity.
- Warmest month
- 96°F(36°C)
- Average high, July
- Coldest nights
- 17°F(-8°C)
- Average low, January
- Rain per year
- 7.7 in(195 mm)
- No clear rainy season
- Humidity
- 45%
- Sunniest: June
Best and worst months in Grand Junction
Best for weatherApril, May and October are the best time for weather in Grand Junction: highs near 73°F (23°C) and about 0.8 in (19 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 40°F (5°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 May.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Grand Junction weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 40°F(5°C) | 17°F(-8°C) | 0.6 in(14 mm) | 75% | 2.4 |
| FebFebruary | 48°F(9°C) | 24°F(-5°C) | 0.5 in(13 mm) | 56% | 3.3 |
| MarMarch | 61°F(16°C) | 33°F(0°C) | 0.7 in(18 mm) | 46% | 4.8 |
| AprAprilBest | 69°F(21°C) | 40°F(4°C) | 0.7 in(17 mm) | 34% | 5.7 |
| MayMayBest | 79°F(26°C) | 49°F(9°C) | 0.7 in(19 mm) | 30% | 6.8 |
| JunJune | 91°F(33°C) | 57°F(14°C) | 0.3 in(8 mm) | 24% | 7.7 |
| JulJuly | 96°F(36°C) | 64°F(18°C) | 0.6 in(14 mm) | 29% | 7.2 |
| AugAugust | 93°F(34°C) | 61°F(16°C) | 0.8 in(20 mm) | 35% | 6.1 |
| SepSeptember | 84°F(29°C) | 52°F(11°C) | 0.9 in(22 mm) | 39% | 5.3 |
| OctOctoberBest | 70°F(21°C) | 39°F(4°C) | 0.9 in(22 mm) | 41% | 4.0 |
| NovNovember | 54°F(12°C) | 28°F(-2°C) | 0.6 in(16 mm) | 57% | 2.7 |
| DecDecember | 42°F(6°C) | 19°F(-7°C) | 0.5 in(12 mm) | 69% | 2.1 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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