Portage, Indiana Climate by Month
Portage, Indiana, United States
Warm summers and freezing winters, with rain spread through the year.
The climate in Portage is one of warm summers and freezing winters, with rain spread through the year. July is the warmest month, with highs around 84°F (29°C); January is the coolest at 33°F (1°C), and nights dip to 18°F (-8°C). About 39 in (993 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 84°F(29°C)
- Average high, July
- Coldest nights
- 18°F(-8°C)
- Average low, January
- Rain per year
- 39 in(993 mm)
- No clear rainy season
- Humidity
- 75%
- Sunniest: July
Best and worst months in Portage
Best for weatherThe most comfortable weather comes in September, with highs around 76°F (24°C) and about 3.4 in (86 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 33°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)
Portage weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 33°F(1°C) | 18°F(-8°C) | 2.2 in(56 mm) | 86% | 1.4 |
| FebFebruary | 37°F(3°C) | 20°F(-7°C) | 1.7 in(42 mm) | 75% | 2.4 |
| MarMarch | 48°F(9°C) | 29°F(-1°C) | 2.4 in(62 mm) | 76% | 3.6 |
| AprApril | 60°F(16°C) | 39°F(4°C) | 4.2 in(106 mm) | 66% | 4.5 |
| MayMay | 71°F(22°C) | 49°F(9°C) | 4.4 in(113 mm) | 68% | 5.2 |
| JunJune | 80°F(27°C) | 58°F(15°C) | 4.5 in(115 mm) | 70% | 5.9 |
| JulJuly | 84°F(29°C) | 63°F(17°C) | 3.8 in(97 mm) | 72% | 6.0 |
| AugAugust | 82°F(28°C) | 61°F(16°C) | 3.9 in(100 mm) | 76% | 5.2 |
| SepSeptemberBest | 76°F(24°C) | 54°F(12°C) | 3.4 in(86 mm) | 72% | 4.3 |
| OctOctober | 64°F(18°C) | 42°F(6°C) | 3.3 in(83 mm) | 72% | 2.8 |
| NovNovember | 49°F(10°C) | 32°F(0°C) | 2.9 in(74 mm) | 81% | 1.7 |
| DecDecember | 37°F(3°C) | 23°F(-5°C) | 2.3 in(59 mm) | 88% | 1.3 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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