Bay City, Michigan Climate by Month
Bay City, Michigan, United States
Warm summers and freezing winters, with rain spread through the year.
Warm summers and freezing winters, with rain spread through the year: that's Bay City's climate in short. July is the warmest month, with highs around 83°F (28°C); January is the coolest at 30°F (-1°C), and nights dip to 16°F (-9°C). About 31 in (777 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 83°F(28°C)
- Average high, July
- Coldest nights
- 16°F(-9°C)
- Average low, January
- Rain per year
- 31 in(777 mm)
- No clear rainy season
- Humidity
- 73%
- Sunniest: July
Best and worst months in Bay City
Best for weatherThe most comfortable weather comes in June and September, with highs around 76°F (24°C) and about 3.3 in (84 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 30°F (-1°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in September.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Bay City weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 30°F(-1°C) | 16°F(-9°C) | 1.6 in(41 mm) | 96% | 1.3 |
| FebFebruary | 32°F(0°C) | 17°F(-8°C) | 1.4 in(35 mm) | 90% | 2.2 |
| MarMarch | 42°F(6°C) | 26°F(-3°C) | 2.0 in(50 mm) | 76% | 3.5 |
| AprApril | 55°F(13°C) | 36°F(2°C) | 3.1 in(78 mm) | 58% | 4.4 |
| MayMay | 68°F(20°C) | 47°F(8°C) | 3.4 in(86 mm) | 62% | 5.1 |
| JunJuneBest | 78°F(26°C) | 57°F(14°C) | 3.2 in(82 mm) | 65% | 5.9 |
| JulJuly | 83°F(28°C) | 61°F(16°C) | 2.5 in(63 mm) | 68% | 5.9 |
| AugAugust | 80°F(27°C) | 59°F(15°C) | 2.9 in(74 mm) | 72% | 5.0 |
| SepSeptemberBest | 74°F(23°C) | 52°F(11°C) | 3.3 in(85 mm) | 72% | 4.1 |
| OctOctober | 61°F(16°C) | 41°F(5°C) | 2.9 in(74 mm) | 71% | 2.4 |
| NovNovember | 47°F(8°C) | 31°F(0°C) | 2.4 in(61 mm) | 74% | 1.5 |
| DecDecember | 35°F(2°C) | 22°F(-5°C) | 1.9 in(48 mm) | 75% | 1.1 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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