Boise vs Lewiston, Idaho Climate
80%matchOn climate, Lewiston is a 80% match for Boise. Compared with Boise, Lewiston has the same summer highs, less sun, 4°F (2°C) milder winter nights and more humid air.
Boise gets 12 in (294 mm) of rain a year and Lewiston 13 in (318 mm). July is the warmest month in both, with highs of 92°F (33°C) in Boise and 93°F (34°C) in Lewiston.
Climate fingerprints: ring color = average temperature, thickness = rain. January at the top.
Month by month
Highs and lows (°F)
BoiseLewistonsolid = high, dashed = low
Rain (in per month)
BoiseLewiston
Monthly averages
| Month | High | Low | Rain | |||
|---|---|---|---|---|---|---|
| Boise | Lewiston | Boise | Lewiston | Boise | Lewiston | |
| Jan | 40°F(5°C) | 42°F(6°C) | 25°F(-4°C) | 31°F(-1°C) | 1.5 in(39 mm) | 1.3 in(32 mm) |
| Feb | 46°F(8°C) | 48°F(9°C) | 29°F(-2°C) | 32°F(0°C) | 1.0 in(26 mm) | 1.1 in(28 mm) |
| Mar | 56°F(13°C) | 57°F(14°C) | 34°F(1°C) | 37°F(3°C) | 1.3 in(33 mm) | 1.3 in(34 mm) |
| Apr | 63°F(17°C) | 64°F(18°C) | 38°F(3°C) | 41°F(5°C) | 1.2 in(30 mm) | 1.3 in(33 mm) |
| May | 73°F(23°C) | 73°F(23°C) | 46°F(8°C) | 48°F(9°C) | 1.3 in(32 mm) | 1.5 in(37 mm) |
| Jun | 81°F(27°C) | 82°F(28°C) | 52°F(11°C) | 55°F(13°C) | 0.7 in(19 mm) | 1.1 in(27 mm) |
| Jul | 92°F(33°C) | 93°F(34°C) | 59°F(15°C) | 60°F(16°C) | 0.2 in(4 mm) | 0.4 in(10 mm) |
| Aug | 92°F(33°C) | 92°F(33°C) | 59°F(15°C) | 58°F(15°C) | 0.2 in(4 mm) | 0.4 in(11 mm) |
| Sep | 81°F(27°C) | 80°F(27°C) | 50°F(10°C) | 50°F(10°C) | 0.5 in(12 mm) | 0.6 in(15 mm) |
| Oct | 66°F(19°C) | 65°F(18°C) | 40°F(4°C) | 40°F(5°C) | 0.8 in(21 mm) | 1.1 in(27 mm) |
| Nov | 51°F(11°C) | 51°F(10°C) | 31°F(0°C) | 36°F(2°C) | 1.3 in(33 mm) | 1.3 in(33 mm) |
| Dec | 41°F(5°C) | 42°F(6°C) | 26°F(-3°C) | 30°F(-1°C) | 1.6 in(41 mm) | 1.2 in(31 mm) |
1991–2020 averages, by calendar month.