Hillsborough

Lawrence County, California, United States

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Current Weather

16°

Overcast

Feels Like: 13°

Min: 14°

Max: 28°

The next few hours will be clear, with tomorrow reaching 21°C and dropping to 13°C. The coming days will be partly cloudy

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Hourly Forecast

16° 16° 16° 15° 15° 15° 14° 14° 14° 16° 17° 18° 19° 21° 21° 21° 20° 19° 19° 17° 15° 14° 13° 13°
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11am
12pm
1pm
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Today
Tomorrow

Daylight Hours

06:56

Sunrise

19:12

Sunset

12 hours 16 minutes of sunlight today

Moon

Waxing Crescent

10:40

Moonrise

20:27

Moonset

Daily Forecast

Monday

14°
28°

Today

13°
21°

Wednesday

13°
18°

Thursday

15°
22°

Friday

14°
22°

Saturday

14°
21°

Sunday

14°
20°

Monday

14°
21°

Tuesday

13°
23°

Wednesday

11°
18°

Air Quality Data Available

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UV Index

No protection needed
0 Low
Low Extreme

Humidity

69% Comfortable
Low High

Weather in Hillsborough tomorrow, September 15, 2026

Hillsborough is set for a fine, sunny day on September 15, 2026, with only limited interruptions to the clear sky. The early hours look particularly favourable for being outside. 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.

Expect highs of 21°C and cooler readings close to 13°C. Expect humidity between 60% and 89%, most humid near 22:00. Expect gentle winds, highest near 15:00 at 6.9 km/h.

Later hours favour clearer intervals, as cloud stays near 21% around 21:00. The afternoon is the better half for outdoor time. Visibility stays generally good near 13.9 km on average, though it can drop toward 8.0 km in thicker cloud or showers. The sun rises at 06:57 and sets at 19:10, for a total of 12 hours 13 minutes of sunlight today.

The practical takeaway for Hillsborough is a bright September 15, 2026, ideal for outdoor errands before temperatures ease from about 21°C.

Frequently asked questions about weather in Hillsborough

How warm does it get in Hillsborough?

The warmest month in Hillsborough is September, with average high temperatures of 19°C. The average temperature during this period is around 16°C.

How cold does it get in Hillsborough?

The coldest month in Hillsborough is February, with average low temperatures of 9°C. The average temperature during this period is around 11°C.

What is the wettest time of year in Hillsborough?

The wettest month in Hillsborough is January, with an average of 113mm of precipitation.

What is the driest time of year in Hillsborough?

The driest month in Hillsborough is July, with an average of 1mm of precipitation.

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Metric (°C, km/h)