Spring Valley

Whatcom County, California, United States

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Current Weather

20°

Partly Cloudy

Feels Like: 29°

Min: 18°

Max: 25°

The next few hours will be overcast, with tomorrow reaching 29°C and dropping to 20°C. The coming days will be mostly clear throughout the day.

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Hourly Forecast

21° 20° 20° 20° 20° 20° 20° 20° 20° 20° 20° 20° 20° 20° 21° 22° 23° 28° 29° 28° 27° 26° 25° 24°
6pm
7pm
8pm
9pm
10pm
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12am
1am
2am
3am
4am
5am
6am
7am
8am
9am
10am
11am
12pm
1pm
2pm
3pm
4pm
5pm
Today
Tomorrow

Daylight Hours

06:36

Sunrise

18:49

Sunset

12 hours 13 minutes of sunlight today

Moon

Waxing Crescent

10:07

Moonrise

20:13

Moonset

Daily Forecast

Monday

18°
25°

Today

20°
29°

Wednesday

20°
27°

Thursday

20°
28°

Friday

22°
29°

Saturday

22°
29°

Sunday

23°
29°

Monday

23°
29°

Tuesday

19°
28°

Wednesday

17°
24°

Air Quality Data Available

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UV Index

No protection needed
1 Low
Low Extreme

Humidity

85% Humid
Low High

Weather in Spring Valley tomorrow, September 15, 2026

Spring Valley starts September 15, 2026 under largely sunny skies, with bright spells setting the tone from the outset. Outdoor plans should enjoy long stretches of open sky as the day unfolds. The first half of the day looks overcast, as cloud amounts reach about 100% around 00:00. Brighter weather, if it comes, waits until later.

The temperature range runs from about 20°C up to 29°C. Relative humidity sits between 58% and 89%, reaching its peak around 00:00. A lighter breeze peaks around 11:00 near 5.9 km/h.

Later hours favour clearer intervals, as cloud stays near 40% around 17:00. The afternoon is the better half for outdoor time. Horizontal visibility sits around 15.3 km, briefly nearer 13.4 km. The sun rises at 06:36 and sets at 18:48, for a total of 12 hours 11 minutes of sunlight today.

The practical takeaway for Spring Valley is a bright September 15, 2026, ideal for outdoor errands before temperatures ease from about 29°C.

Frequently asked questions about weather in Spring Valley

How warm does it get in Spring Valley?

The warmest month in Spring Valley is August, with average high temperatures of 28°C. The average temperature during this period is around 23°C.

How cold does it get in Spring Valley?

The coldest month in Spring Valley is January, with average low temperatures of 9°C. The average temperature during this period is around 13°C.

What is the wettest time of year in Spring Valley?

The wettest month in Spring Valley is March, with an average of 67mm of precipitation.

What is the driest time of year in Spring Valley?

The driest month in Spring Valley is June, with an average of 2mm of precipitation.

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