Tomorrow's Weather Forecast - Grand Rapids

Tomorrow's weather in Grand Rapids. high 28°C (82°F), low 15°C (59°F). Overcast.

Tomorrow’s Outlook

Tomorrow will be 3°C warmer than today. Expect pleasant, mostly clear skies with little chance of rain. Humidity stays high near 78%, so it will feel muggier and stickier than the temperature alone suggests. A light breeze near 22 km/h is expected. Sunrise is at 7:19 AM and sunset at 7:57 PM, for about 12h 39m of daylight.

Tomorrow
28°/ 15°
Today25° / 9°

Tomorrow’s Hourly Weather Outlook

Morning6 AM – Noon18°
Rain probability
3%
Wind speed
13 km/h
AfternoonNoon – 6 PM27°
Rain probability
2%
Wind speed
22 km/h
Evening6 PM – Midn23°
Rain probability
5%
Wind speed
18 km/h
NightMidn – 6 AM15°
Rain probability
0%
Wind speed
9 km/h

24-Hour Rain & Temperature Forecast

Tomorrow12 Sep
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Temperature · peaks at +28°C

Planning Advice for Tomorrow

Clothing
Light layers work well; a jacket for the evening.
Outdoor
Good conditions for outdoor activities.
Travel
Standard travel conditions expected.

Sunrise & Sunset

Sunrise
Dawn 6:49 AM
Total Daylight
Full day forecastSolar noon 1:38 PM
Sunset
Dusk 8:27 PM
vs today-2 min daylight
Sunrise shift1 min later
Sunset shift2 min earlier

5-Day Weather Forecast

Full 15-Day Forecast

Weather Insight

Grand Rapids is forecast to reach a high of 28°C tomorrow, with an overnight low around 15°C. That's 5° above the long-term average high of 23°C for this time of year. It continues a recent pattern — 15 of the last 19 days with published data have run warmer than normal. Expect little chance of rain (5% probability) and moderate breezes averaging 22 km/h. Air quality is currently good (AQI 27), with no notable outdoor health concerns.

Today vs Normal

25°C+2° above normal

The long-term average high for today is 23°C.

15 of the last 19 days with published data ran above normal.

It continues that pattern - today's forecast is also running above normal.

2026-08-19: 26°C26°2026-08-20: 27°C27°2026-08-21: 26°C26°2026-08-22: 25°C25°2026-08-23: 22°C22°2026-08-24: 23°C23°2026-08-25: 26°C26°2026-08-26: 25°C25°2026-08-27: 26°C26°2026-08-28: 26°C26°2026-08-29: 26°C26°2026-08-30: 25°C25°

Red = above normal, blue = at or below · last 12 days

Air Quality

Air Quality
Good

Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.