Lewiston weather by month & the best time to visit
🇺🇸 United States · small town · Mediterranean climate
The best time to visit Lewiston is July — its sunniest month (Sunshine Score 92/100), with August and September close behind. Lewiston averages about 2,521 hours of sunshine a year. Daytime highs around 32°C / 90°F and roughly 12 mm of rain in July.
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- Sun hours / year
- 2,521
- Sunniest month
- July
- Peak score
- 92/100
- Rain / year
- 665 mm
- Snow / year
- ≈79 cm
- Midday UV at peak
- 8 (very high)
- Population
- 36k
- Elevation
- 433 m
When is the best time to visit Lewiston?
For sunshine, the best time to visit Lewiston is July, then August and September. The dullest month is January (0/100, 82 mm of rain). The full month-by-month picture is in the table below.
How sunny is Lewiston?
Lewiston gets a lot of sun: around 2,521 hours a year. 92 Sunshine Score points separate July (92) from January (0), so the month you pick matters. It ranks #197 of 580 destinations in United States for annual sunshine, above the national median of 2,279 hours. The year's 665 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 | 4° / 39°F | -4° / 25°F | 82 mm | 1 |
| February | 0 | 7° / 45°F | -2° / 28°F | 63 mm | 2 |
| March | 20 | 11° / 52°F | 1° / 34°F | 79 mm | 3 |
| April | 55 | 16° / 61°F | 4° / 39°F | 61 mm | 4 |
| May | 82 | 21° / 70°F | 9° / 48°F | 62 mm | 6 |
| June | 85 | 25° / 77°F | 12° / 54°F | 50 mm | 7 |
| July | 92 | 32° / 90°F | 17° / 63°F | 12 mm | 8 |
| August | 90 | 31° / 88°F | 16° / 61°F | 19 mm | 7 |
| September | 89 | 26° / 79°F | 12° / 54°F | 23 mm | 5 |
| October | 63 | 17° / 63°F | 5° / 41°F | 53 mm | 3 |
| November | 7 | 9° / 48°F | 0° / 32°F | 75 mm | 1 |
| December | 0 | 4° / 39°F | -4° / 25°F | 86 mm | 0 |
See Lewiston on the interactive sunshine globe →
Nearby places for sunshine
- Spokane United States · 144 km · best in Jul · 2,367 h sun/yr
- Pasco United States · 162 km · best in Sep · 2,745 h sun/yr
- Missoula United States · 231 km · best in Jul · 2,308 h sun/yr
- Kalispell United States · 299 km · best in Jul · 2,199 h sun/yr
- Boise United States · 319 km · best in Sep · 2,989 h sun/yr
- Redmond United States · 400 km · best in Jul · 2,712 h sun/yr
Nearest destinations
- Pullman United States · 41 km · 2,523 h sun/yr · best in Jul
- Walla Walla United States · 103 km · 2,744 h sun/yr · best in Jul
- Pendleton United States · 160 km · 2,696 h sun/yr · best in Jul
- McCall United States · 180 km · 2,837 h sun/yr · best in Jul
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