Grand Rapids vs Sarnia Climate
99%matchOn climate, Sarnia is a 99% match for Grand Rapids. Very close: temperatures within 3°F (1°C), with similar rain, humidity and sun.
Grand Rapids gets 37 in (944 mm) of rain a year and Sarnia 34 in (857 mm). July is the warmest month in both, with highs of 84°F (29°C) in Grand Rapids and 81°F (27°C) in Sarnia.
Climate fingerprints: ring color = average temperature, thickness = rain. January at the top.
Month by month
Highs and lows (°F)
Grand RapidsSarniasolid = high, dashed = low
Rain (in per month)
Grand RapidsSarnia
Monthly averages
| Month | High | Low | Rain | |||
|---|---|---|---|---|---|---|
| Grand Rapids | Sarnia | Grand Rapids | Sarnia | Grand Rapids | Sarnia | |
| Jan | 32°F(0°C) | 31°F(0°C) | 18°F(-8°C) | 18°F(-8°C) | 2.4 in(60 mm) | 2.3 in(58 mm) |
| Feb | 35°F(1°C) | 33°F(1°C) | 19°F(-7°C) | 18°F(-8°C) | 1.7 in(43 mm) | 2.2 in(56 mm) |
| Mar | 45°F(7°C) | 42°F(5°C) | 27°F(-3°C) | 26°F(-3°C) | 2.3 in(59 mm) | 2.1 in(53 mm) |
| Apr | 58°F(15°C) | 53°F(12°C) | 36°F(2°C) | 36°F(2°C) | 3.6 in(92 mm) | 3.1 in(78 mm) |
| May | 71°F(22°C) | 66°F(19°C) | 48°F(9°C) | 46°F(8°C) | 4.4 in(111 mm) | 3.2 in(81 mm) |
| Jun | 80°F(27°C) | 76°F(25°C) | 57°F(14°C) | 56°F(13°C) | 3.7 in(95 mm) | 3.6 in(91 mm) |
| Jul | 84°F(29°C) | 81°F(27°C) | 61°F(16°C) | 62°F(17°C) | 3.1 in(78 mm) | 2.7 in(69 mm) |
| Aug | 82°F(28°C) | 80°F(27°C) | 59°F(15°C) | 62°F(16°C) | 3.5 in(88 mm) | 2.8 in(72 mm) |
| Sep | 75°F(24°C) | 74°F(23°C) | 52°F(11°C) | 55°F(13°C) | 3.7 in(94 mm) | 3.5 in(89 mm) |
| Oct | 62°F(17°C) | 62°F(16°C) | 41°F(5°C) | 45°F(7°C) | 3.3 in(83 mm) | 3.1 in(78 mm) |
| Nov | 48°F(9°C) | 48°F(9°C) | 32°F(0°C) | 34°F(1°C) | 2.9 in(73 mm) | 2.8 in(72 mm) |
| Dec | 36°F(2°C) | 37°F(3°C) | 24°F(-5°C) | 25°F(-4°C) | 2.7 in(68 mm) | 2.4 in(60 mm) |
1991–2020 averages, by calendar month.