Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
Severe storms on repeat for Plains to mid-Atlantic this week. See the timing. Chevron right
A new heat dome is set to expand across the central and eastern US. Click for the forecast. Chevron right

Knightsen, CA

87°F
Location Chevron down
Location News Videos
Use Current Location
Recent

Knightsen

California

87°
No results found.
Try searching for a city, zip code or point of interest.
Get Premium+
Create Your Account Unlock extended daily and hourly forecasts — all with your free account.
Let's Go Chevron right
Have an account already? Log In
settings
Help
Knightsen, CA Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

News & Features

Astronomy

Business

Climate

Health

Recreation

Sports

Travel

For Business

Warnings

Data Suite

Forensics

Advertising

Superior Accuracy™

Video

Winter Center

Today Hourly 10-Day Radar MinuteCast®

Monthly

Air Quality Health & Activities

September

January February March April May June July August September October November December

2026

2025 2026 2027

10-Day

S
M
T
W
T
F
S
30
Sunny
88°
60°
31
Plenty of sunshine
91°
62°
1
Radiant sunshine and warm
92°
62°
2
Partly sunny and warm
92°
61°
3
Partly sunny
87°
62°
4
A sun-and-cloud mix
86°
62°
5
Mostly sunny
90°
61°
6
Warm with plenty of sun
92°
62°
7
Warm with plenty of sunshine
92°
62°
8
Sunny and remaining warm
91°
61°
9
Plenty of sunshine
91°
58°
10
Plenty of sunshine
86°
54°
11
Mostly sunny
85°
54°
12
Plenty of sunshine
85°
55°
13
Mostly sunny
84°
58°
14
Plenty of sun
83°
57°
15
Sunny
87°
56°
16
Sunshine and some clouds
88°
59°
17
Partly sunny
87°
62°
18
Mostly sunny
90°
63°
19
Cloudy and humid
81°
63°
20
Mostly cloudy and humid
82°
62°
21
Partly sunny and less humid
88°
61°
22
Plenty of sunshine
89°
62°
23
Mostly sunny
86°
61°
24
Mostly sunny
87°
62°
25
Plenty of sun
88°
61°
26
Sunny much of the time
87°
61°
27
Plenty of sunshine
87°
60°
28
Plenty of sunshine
81°
60°
29
Mostly sunny
81°
61°
30
Mostly sunny
82°
61°
1
Plenty of sunshine
86°
60°
2
Warm with plenty of sunshine
88°
61°
3
Warm with plenty of sunshine
87°
59°

Temperature Graph

°F
100° 90° 80° 70° 60° Sep
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo

September Weather in Knightsen

Knightsen's September 2026 forecast shows daily high temperatures ranging from 81° to 92°, with overnight lows between 54° and 63°. The average high for September is 87° with an average low of 60°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Knightsen. See also: October | November | December.

Further Ahead

October 2026

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Weather Forecasts

Next heat dome to bring 100 F heat to Midwest; perhaps East again

4 hours ago

Severe Weather

Tireless severe storms to repeat from Plains to mid-Atlantic

4 hours ago

Hurricane

Atlantic hurricane season off to a slow start as El Niño strengthens

5 hours ago

Weather Forecasts

Downpours may rapidly elevate flash flood risk centered on Kentucky

5 hours ago

Live Blog

Live: World Cup 2026 weather updates

LATEST ENTRY

Quarterfinals to commence with heat on Thursday

1 day ago

More Stories

Featured Stories

Super Typhoon Bavi leaves trail of destruction

10 hours ago 0:36

Recreation

Neil the Seal returns to Tasmania

4 hours ago

Weather News

At least 750 structures destroyed by Colorado wildfire, images show

4 hours ago

Weather News

Toll from Venezuela earthquakes rises to 3,342, more than 16K injured

2 days ago

World North America United States California Knightsen

Weather Near Knightsen:

  • Oakland, CA
  • San Francisco, CA
  • San Jose, CA
Company
Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Personal Weather Stations
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
Company
Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Personal Weather Stations
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
© 2026 AccuWeather, Inc. "AccuWeather" and sun design are registered trademarks of AccuWeather, Inc. All Rights Reserved.
Terms of Use | Privacy Policy | Cookie Policy | About Your Privacy Do Not Sell or Share My Personal Information | Data Sources

...

...

...