Nampa Weather in September

With daytime temperatures of 27°C (81°F) and nighttime lows of 9°C (48°F), September in Nampa brings high temperatures during the day. The excellent weather makes it an appealing time to visit.

Rainfall in Nampa in September

Rain is expected on roughly 4 days, totalling around 15 mm (0.6 in) for the month. Rain days are few and the total is low, so this is a largely dry month. Any showers that do occur tend to be brief.

Temperature in Nampa in September

Nampa has excellent weather in September, with days reaching 27°C (81°F) and nights cooling to 9°C (48°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. At 9°C (48°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.

Sunshine in Nampa in September

There are approximately 303 hours of sunshine this month, resulting in mostly clear days.

So this is a great month to visit if you prefer dry days with pleasant temperatures.

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Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Nampa's climate page.

Nampa Temperature in September

Min Temperature 9°C (48°F)  

Max Temperature 27°C (81°F)  

Chance of Rain 13%  

Precipitation 15 mm (0.6 in)  

Rainy days 4 days  

Humidity 45% *  

Sunshine 303 hours *  

Percentage Sunshine 81% *  

* Data from: Boise, the United States of America (29 KM, 18 Miles).

What to Wear in Nampa in September

Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Almost no rain is expected, so no need to bring rain gear. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Nampa in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

10/10

Cycling

8/10

Walking

8/10

Barbeque

10/10

Camping

5/10

Outdoor sports

8/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Nampa's climate page.

More climate data for Nampa

Temperature Rainfall Sunshine Humidity

See the full Nampa climate overview or explore weather in the United States of America.