
Holy Cross Wilderness
- Annual mean
- -0.9 °C
- Warmest month
- July
- Wettest month
- April
Year-round analysis of average temperature, precipitation, and wind patterns.
Review the multi-year atmospheric profile of Flat Tops Wilderness using representative coordinates at 2640.2 meters elevation. These monthly averages detail thermal shifts, precipitation rates, relative humidity, wind speed, and daylight duration from 1991 to 2020. This data offers a factual basis for understanding the annual climate rhythm without factoring in transient weather events or specific microclimate variation.

Long-term monthly thermal ranges and precipitation rates recorded across twelve calendar cycles
Analyze long-term temperature bounds, average daily precipitation, humidity, and daylight across the calendar year.
| Mean temperature | Precipitation | Humidity | Wind speed | Daylight | |
|---|---|---|---|---|---|
| January | -9.6 °C-24.7° to 1.8° | 1.6 mm/day | 88.3% | 3.1 m/s | 9.5 hours |
| February | -8 °C-23.1° to 3.2° | 1.6 mm/day | 85.7% | 3.3 m/s | 10.5 hours |
| March | -3 °C-18.1° to 10.4° | 1.5 mm/day | 73.8% | 3.4 m/s | 11.7 hours |
| April | 1.5 °C-11.6° to 16.7° | 2 mm/day | 64.1% | 3.6 m/s | 13.1 hours |
| May | 7.2 °C-6.3° to 22° | 1.7 mm/day | 58% | 3.2 m/s | 14.2 hours |
| June | 13.3 °C-1.6° to 26.9° | 0.9 mm/day | 47.1% | 3.2 m/s | 14.8 hours |
| July | 17.2 °C4.6° to 29.3° | 1.1 mm/day | 47.8% | 2.6 m/s | 14.5 hours |
| August | 15.9 °C3.9° to 28° | 1.2 mm/day | 50.2% | 2.5 m/s | 13.5 hours |
| September | 11.1 °C-3.2° to 25.2° | 1.5 mm/day | 50.3% | 2.9 m/s | 12.2 hours |
| October | 3.6 °C-10.2° to 19.2° | 1.5 mm/day | 58.3% | 3 m/s | 10.9 hours |
| November | -3.5 °C-18.2° to 11° | 1.5 mm/day | 71.5% | 3.1 m/s | 9.8 hours |
| December | -9.1 °C-24° to 3.5° | 1.4 mm/day | 85% | 3.1 m/s | 9.2 hours |
See two months side by side and how much they differ. Both use the same 1991–2020 climate normals and NASA POWER data point as the table above, so they show typical conditions, not a forecast.
Comparative monthly normals for temperature, precipitation, humidity, wind, and daylight duration
Interactive climate map
Open the climate map to compare monthly temperature, precipitation, and other averages.
Explore long-term monthly climate normals across diverse geographic settings








Use this structured geographic resource to trace the boundaries and landscape features of Flat Tops Wilderness. Discover how this massive basalt plateau and its network of alpine lakes form one of the most unique protected areas in the United States of America.