easeweather.com
Oceanside (CA)
Akron (OH)Albuquerque (NM)Alexandria (VA)Anaheim (CA)Anchorage (AK)Arlington (VA)Atlanta (GA)Atlantic City (NJ)Austin (TX)Baltimore (MD)Baton Rouge (LA)Birmingham (AL)Boston (MA)Brooklyn (NY)Buffalo (NY)Cape Coral (FL)Charlotte (NC)Chattanooga (TN)Chicago (IL)Cincinnati (OH)Cleveland (OH)Colorado Springs (CO)Columbus (OH)Corpus Christi (TX)Dallas (TX)Dayton (OH)Denver (CO)Des Moines (IA)Detroit (MI)El Paso (TX)Fairbanks (AK)Fayetteville (NC)Fort Lauderdale (FL)Fort Wayne (IN)Fort Worth (TX)Gatlinburg (TN)Grand Rapids (MI)Harrisburg (PA)Honolulu (HI)Houston (TX)Huntsville (AL)Indianapolis (IN)Jackson (MS)Jacksonville (FL)Juneau (AK)Kansas City (MO)Ketchikan (AK)Key West (FL)Knoxville (TN)Las Vegas (NV)Lexington (KY)Lincoln (NE)Little Rock (AR)Los Angeles (CA)Louisville (KY)Madison (WI)Manhattan (NY)Memphis (TN)Miami (FL)Milwaukee (WI)Minneapolis (MN)Mobile (AL)Montgomery (AL)Nashville (TN)New Orleans (LA)New York City (NY)Newark (NJ)
Oceanside (CA)
Oklahoma City (OK)Omaha (NE)Orlando (FL)Philadelphia (PA)Phoenix (AZ)Pittsburgh (PA)Portland (OR)Richmond (VA)Riverside (CA)Sacramento (CA)Salt Lake City (UT)San Antonio (TX)San Diego (CA)San Francisco (CA)San Jose (CA)Savannah (GA)Seattle (WA)Sitka (AK)Skagway (AK)Springfield (MO)St. Louis (MO)St. Petersburg (FL)Tallahassee (FL)Tampa (FL)Toledo (OH)Traverse City (MI)Tulsa (OK)Tyler (TX)Vancouver (WA)Virginia Beach (VA)WashingtonWichita (KS)Winston-Salem (NC) More Locations
United States weather

Weather in Oceanside, California for September 2025

Your guide to Oceanside weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Oceanside is cooler than usual, with temperatures averaging 22.6 °F, this is -2.3 °F below the typical seasonal average.

  • Expect cooler weather in the next days in Oceanside with the forecast suggesting a temperature of 23.3 °F, lower than the historical average.

  • In general, the average temperature in Oceanside at the beginning of September is 25.9 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21.6 °F by the end of September.

    • Rain 🌧️

  • Precipitation in Oceanside during September is a rare event, with an average of fewer than 2 rainy days.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
29
Dry days
Average rainy days
1
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/17°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
76 %
Avg humidity

Oceanside Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Partly cloudy
25°
2
Overcast
26°
3
Patchy rain possible
26°
4
Partly cloudy
25°
5
Mist
26°
6
Overcast
26°
7
Partly cloudy
27°
8
Partly cloudy
28°
9
Partly cloudy
27°
10
Overcast
25°
11
Cloudy
23°
12
Mist
23°
13
Cloudy
22°
14
Cloudy
22°
15
Partly cloudy
23°
16
Mist
21°
17
Overcast
22°
18
Patchy rain possible
25°
19
Partly cloudy
23°
20
Sunny
25°
21
Sunny
25°
22
Sunny
27°
23
Sunny
25°
24
Sunny
24°
25
Sunny
24°
26
Partly cloudy
22°
27
Patchy rain possible
19°
28
Patchy rain possible
21°
29
Partly cloudy
21°
30
Light rain
20°

Temperatures trend during September in Oceanside

See the weather trend as well as the moving average line

September weather in Oceanside day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Partly cloudy
Partly cloudy
 25° /18° 0 mm 7
Sept. 2 Overcast
Overcast
 26° /19° 0 mm 6
Sept. 3 Patchy rain possible
Patchy rain possible
 26° /19° 0.1 mm 6
Sept. 4 Partly cloudy
Partly cloudy
 25° /18° 0 mm 6
Sept. 5 Mist
Mist
 26° /19° 0 mm 7
Sept. 6 Overcast
Overcast
 26° /19° 0 mm 6
Sept. 7 Partly cloudy
Partly cloudy
 27° /18° 0 mm 7
Sept. 8 Partly cloudy
Partly cloudy
 28° /20° 0.1 mm 7
Sept. 9 Partly cloudy
Partly cloudy
 27° /19° 0 mm 7
Sept. 10 Overcast
Overcast
 25° /18° 0 mm 6
Sept. 11 Cloudy
Cloudy
 23° /17° 0 mm 6
Sept. 12 Mist
Mist
 23° /17° 0 mm 5
Sept. 13 Cloudy
Cloudy
 22° /16° 0 mm 5
Sept. 14 Cloudy
Cloudy
 22° /17° 0 mm 5
Sept. 15 Partly cloudy
Partly cloudy
 23° /16° 0 mm 6
Sept. 16 Mist
Mist
 21° /16° 0.3 mm 5
Sept. 17 Overcast
Overcast
 22° /19° 0 mm 0.9
Sept. 18 Patchy rain possible
Patchy rain possible
 25° /21° 3.8 mm 1.7
Sept. 19 Partly cloudy
Partly cloudy
 23° /20° 0 mm 1.9
Sept. 20 Sunny
Sunny
 25° /20° 0 mm 1.9
Sept. 21 Sunny
Sunny
 25° /20° 0 mm 0
Sept. 22 Sunny
Sunny
 27° /21° 0 mm 6
Sept. 23 Sunny
Sunny
 25° /21° 0 mm 6
Sept. 24 Sunny
Sunny
 24° /19° 0 mm 6
Sept. 25 Sunny
Sunny
 24° /19° 0 mm 6
Sept. 26 Partly cloudy
Partly cloudy
 22° /18° 0 mm 5
Sept. 27 Patchy rain possible
Patchy rain possible
 19° /18° 0.1 mm 4
Sept. 28 Patchy rain possible
Patchy rain possible
 21° /18° 0.2 mm 4
Sept. 29 Partly cloudy
Partly cloudy
 21° /17° 0.1 mm 5
Sept. 30 Light rain
Light rain
 20° /15° 1.5 mm 6
Next
Important Notice
Our weather forecast for Oceanside in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Oceanside forecast closer to your planned date for the most up-to-date weather information.
Change Month
‹
›

Oceanside in September - FAQ

What are the expected maximum and minimum temperatures in Oceanside during September?
During September, expect a variety of temperatures with highs around 23° and lows near 17°, suitable for diverse activities and preferences.
How much rainfall should be expected in Oceanside during September?
Rainfall in Oceanside during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 1 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Oceanside during September?
The average wind speed in Oceanside during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Oceanside

Explore the daily rainfall trends and prepare for Oceansides September weather 💧

UV exposure in Oceanside during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

Quick links

More Oceanside weather pages
You are here
Location coordinates Where is Oceanside?

Get accurate weather forecasts for Oceanside, located at latitude 33.196 and longitude -117.379. Stay updated with localized weather information tailored for Oceanside.

Found a mistake?
We appreciate your attention to details. Tell us here.