Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
Grinnell Weather in September
With daytime temperatures of 24°C (75°F) and nighttime lows of 11°C (52°F), September in Grinnell brings high temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 96 mm (3.8 in) falls on average.
Rainfall in Grinnell in September
Historically, the month has about 9 days of rain, averaging 96 mm (3.8 in) in total. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.
Temperature in Grinnell in September
September tends to be one of the excellent months in Grinnell, with 24°C (75°F) in the afternoon and 11°C (52°F) overnight. Overall, the month follows a fairly predictable daily temperature pattern. Nights drop to around 11°C (52°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.If your ideal day consists of dry skies and pleasant temperatures, September typically offers the best circumstances for Grinnell.
Grinnell Temperature in September
Min Temperature
11°C (52°F)
Max Temperature
24°C (75°F)
Chance of Rain
31%
Precipitation
96 mm (3.8 in)
Rainy days
9 days
Grinnell Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Grinnell - and find the best time to visit.
Best Places in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Grinnell in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes.
What To Do in Grinnell in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling9/10 -
Walking9/10 -
Camping8/10 -
Outdoor sports9/10
Grinnell 3-Day Forecast
More climate data for Grinnell
See the full Grinnell climate overview or explore weather in the United States of America.
Popular in September
Where to go in September - average daytime high across popular destinations.
Bucket list
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