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.
Grass Valley Weather in September
September in Grass Valley averages 28°C (82°F) during the day and 13°C (55°F) at night. With only 13 mm (0.5 in) of rainfall expected on average, it's a largely dry month.
Rainfall in Grass Valley in September
Past climate data indicates that roughly 2 days will see rain, totalling around 13 mm (0.5 in) for the month. When rain does fall, showers tend to be light and brief. Most days will be dry.
Temperature in Grass Valley in September
If you're visiting Grass Valley in September, expect excellent temperatures with highs of 28°C (82°F) and overnight lows of 13°C (55°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. With lows of 13°C (55°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.If your ideal day consists of dry skies and pleasant temperatures, May, June, September and October typically offer the best circumstances for Grass Valley.
Grass Valley Temperature in September
Min Temperature
13°C (55°F)
Max Temperature
28°C (82°F)
Chance of Rain
7%
Precipitation
13 mm (0.5 in)
Rainy days
2 days
Grass Valley Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Grass Valley - 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 Grass Valley in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. With minimal rainfall expected, you can leave the rain gear at home.
What To Do in Grass Valley in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling8/10 -
Walking8/10 -
Camping10/10 -
Outdoor sports8/10
Grass Valley 3-Day Forecast
More climate data for Grass Valley
See the full Grass Valley 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
Need travel inspiration? Check out our bucket list articles and be inspired.
Yosemite National Park is definitely worth a visit
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