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United States weather

Weather in Clatsop County, Oregon for September 2027

Your guide to Clatsop County weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in Clatsop County at the beginning of September is 17.6 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 14.8 °C by the end of September.

    • Rain 🌧️

  • Clatsop County experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 187.9 mm.

    • More

  • Is September a good time to visit Clatsop County? check out the best time to travel to Clatsop County page.

  • ✨ Is September a good time to visit Clatsop County? – Ask the AI Weatherman

Average dry days
23
Dry days
Average rainy days
7
Rainy days
Average snowy days
0
Snow days
Average temperatures
16°/12°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
87 %
Avg humidity

Clatsop County Weather September

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

Temperatures trend during September in Clatsop County

See the weather trend as well as the moving average line

September weather in Clatsop County day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Patchy rain possible
Patchy rain possible
 16° /13° 1.7 mm 3
Sept. 2 Moderate rain
Moderate rain
 16° /13° 23.4 mm 3
Sept. 3 Heavy rain
Heavy rain
 16° /11° 87.1 mm 3
Sept. 4 Sunny
Sunny
 19° /12° 0 mm 5
Sept. 5 Sunny
Sunny
 19° /13° 0.2 mm 5
Sept. 6 Sunny
Sunny
 19° /13° 0 mm 5
Sept. 7 Light rain
Light rain
 17° /13° 3.3 mm 4
Sept. 8 Patchy rain possible
Patchy rain possible
 19° /12° 0 mm 5
Sept. 9 Patchy rain possible
Patchy rain possible
 18° /12° 0.1 mm 4
Sept. 10 Overcast
Overcast
 15° /12° 0.3 mm 3
Sept. 11 Light rain
Light rain
 16° /12° 5.9 mm 3
Sept. 12 Light rain
Light rain
 15° /12° 6.1 mm 3
Sept. 13 Patchy rain possible
Patchy rain possible
 15° /12° 0.4 mm 3
Sept. 14 Patchy rain possible
Patchy rain possible
 16° /12° 1.7 mm 3
Sept. 15 Cloudy
Cloudy
 17° /11° 0.7 mm 3
Sept. 16 Sunny
Sunny
 21° /12° 0 mm 5
Sept. 17 Moderate rain
Moderate rain
 17° /12° 10.9 mm 4
Sept. 18 Fog
Fog
 14° /12° 0.1 mm 3
Sept. 19 Fog
Fog
 15° /11° 0 mm 3
Sept. 20 Overcast
Overcast
 14° /11° 0 mm 3
Sept. 21 Light rain
Light rain
 15° /11° 5.1 mm 3
Sept. 22 Fog
Fog
 16° /11° 0 mm 4
Sept. 23 Fog
Fog
 17° /11° 0.5 mm 3
Sept. 24 Light rain
Light rain
 16° /11° 6.4 mm 3
Sept. 25 Heavy rain at times
Heavy rain at times
 14° /11° 8.1 mm 2
Sept. 26 Light rain
Light rain
 15° /11° 2.8 mm 3
Sept. 27 Patchy rain possible
Patchy rain possible
 15° /10° 2.3 mm 3
Sept. 28 Overcast
Overcast
 13° /10° 0 mm 2
Sept. 29 Light rain
Light rain
 14° /12° 7.6 mm 2
Sept. 30 Moderate rain
Moderate rain
 16° /11° 13.2 mm 4
Next
Important Notice
Our weather forecast for Clatsop County 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 Clatsop County forecast closer to your planned date for the most up-to-date weather information.
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Clatsop County in September - FAQ

What are the expected maximum and minimum temperatures in Clatsop County during September?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Clatsop County during September?
Significant rainfall exceeding 187.9 mm is expected in Clatsop County during September, occurring over more than 7 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Clatsop County during September?
The average wind speed in Clatsop County during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Clatsop County

Explore the daily rainfall trends and prepare for Clatsop Countys September weather 💧
Typically, Clatsop County has 7 rainy days in September with a total of 187.9 mm of rainfall.

UV exposure in Clatsop County during September

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