Helena weather by month & the best time to visit
🇺🇸 United States · alpine / mountain town · hot-summer continental climate
The best time to visit Helena is July — its sunniest month (Sunshine Score 88/100), with August and September close behind. Helena averages about 2,679 hours of sunshine a year. Daytime highs around 30°C / 86°F and roughly 34 mm of rain in July.
Jump to: month-by-month table · nearby alternatives · embed this data
- Sun hours / year
- 2,679
- Sunniest month
- July
- Peak score
- 88/100
- Rain / year
- 548 mm
- Snow / year
- ≈1.5 m
- Midday UV at peak
- 8 (very high)
- Population
- 32k
- Elevation
- 1,168 m
When is the best time to visit Helena?
For sunshine, the best time to visit Helena is July, then August and September. The dullest month is January (0/100, 33 mm of rain). The full month-by-month picture is in the table below.
How sunny is Helena?
Helena gets a lot of sun: around 2,679 hours a year. 88 Sunshine Score points separate July (88) from January (0), so the month you pick matters. It ranks #149 of 580 destinations in United States for annual sunshine, above the national median of 2,279 hours. The year's 548 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV |
|---|---|---|---|---|---|
| January | 0 | 1° / 34°F | -9° / 16°F | 33 mm | 1 |
| February | 0 | 2° / 36°F | -9° / 16°F | 35 mm | 2 |
| March | 0 | 7° / 45°F | -4° / 25°F | 41 mm | 3 |
| April | 28 | 12° / 54°F | 0° / 32°F | 58 mm | 4 |
| May | 68 | 18° / 64°F | 5° / 41°F | 73 mm | 6 |
| June | 80 | 23° / 73°F | 9° / 48°F | 83 mm | 7 |
| July | 88 | 30° / 86°F | 14° / 57°F | 34 mm | 8 |
| August | 88 | 29° / 84°F | 13° / 55°F | 37 mm | 7 |
| September | 87 | 22° / 72°F | 7° / 45°F | 41 mm | 5 |
| October | 36 | 13° / 55°F | 1° / 34°F | 41 mm | 3 |
| November | 0 | 6° / 43°F | -4° / 25°F | 36 mm | 1 |
| December | 0 | 0° / 32°F | -9° / 16°F | 36 mm | 1 |
See Helena on the interactive sunshine globe →
Nearby places for sunshine
- Great Falls United States · 108 km · best in Jul · 2,659 h sun/yr
- Bozeman United States · 112 km · best in Jul · 2,641 h sun/yr
- Missoula United States · 164 km · best in Jul · 2,308 h sun/yr
- Kalispell United States · 255 km · best in Jul · 2,199 h sun/yr
- Billings United States · 279 km · best in Jul · 2,701 h sun/yr
- Idaho Falls United States · 344 km · best in Jul · 2,995 h sun/yr
Nearest destinations
- Butte United States · 83 km · 2,777 h sun/yr · best in Jul
- Salmon United States · 221 km · 2,775 h sun/yr · best in Jul
- West Yellowstone United States · 224 km · 2,635 h sun/yr · best in Jul
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