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Weather in Mission for September 2026

Your guide to Mission weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Mission has been nearly identical to the historical average, with a temperature of 23.9 °C (showing only a slight deviation of 0 °C).

  • Expect cooler weather in the next days in Mission with the forecast suggesting a temperature of 21.7 °C, lower than the historical average.

  • In general, the average temperature in Mission at the beginning of September is 24.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.3 °C by the end of September.

    • Rain 🌧️

  • The climate of Mission in September is notably wet, with an average of 12 rainy days, and a total of 105.6 mm of precipitation.

    • More

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

Average dry days
18
Dry days
Average rainy days
12
Rainy days
Average snowy days
0
Snow days
Average temperatures
20°/11°
Temperatures
Average wind speed
8 km/h
Avg max wind
Average humidity
79 %
Avg humidity

Mission Weather September

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

Temperatures trend during September in Mission

See the weather trend as well as the moving average line

September weather in Mission day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 25° /12° 0 mm 6
2 Sept. Mist
Mist
 24° /13° 0.6 mm 5
3 Sept. Light drizzle
Light drizzle
 23° /12° 0.2 mm 6
4 Sept. Mist
Mist
 23° /12° 0.1 mm 5
5 Sept. Sunny
Sunny
 27° /12° 0 mm 6
6 Sept. Sunny
Sunny
 26° /12° 0 mm 6
7 Sept. Cloudy
Cloudy
 22° /12° 5.8 mm 5
8 Sept. Sunny
Sunny
 23° /12° 0 mm 5
9 Sept. Overcast
Overcast
 22° /11° 0 mm 4
10 Sept. Overcast
Overcast
 21° /12° 0 mm 5
11 Sept. Overcast
Overcast
 21° /9° 0 mm 3.5
12 Sept. Overcast
Overcast
 23° /10° 0 mm 3.7
13 Sept. Sunny
Sunny
 18° /9° 0.1 mm 2.8
14 Sept. Overcast
Overcast
 20° /11° 0 mm 3.4
15 Sept. Sunny
Sunny
 21° /10° 0 mm 6
16 Sept. Sunny
Sunny
 27° /10° 0 mm 7
17 Sept. Sunny
Sunny
 28° /13° 0 mm 7
18 Sept. Sunny
Sunny
 29° /14° 0 mm 7
19 Sept. Sunny
Sunny
 25° /14° 0 mm 6
20 Sept. Patchy rain possible
Patchy rain possible
 17° /12° 0.2 mm 4
21 Sept. Patchy rain possible
Patchy rain possible
 17° /10° 2.3 mm 4
22 Sept. Patchy rain possible
Patchy rain possible
 16° /8° 3.1 mm 5
23 Sept. Sunny
Sunny
 21° /6° 0 mm 6
24 Sept. Sunny
Sunny
 21° /9° 0 mm 6
25 Sept. Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
 16° /9° 21.4 mm 4
26 Sept. Light rain shower
Light rain shower
 14° /7° 10 mm 4
27 Sept. Overcast
Overcast
 15° /10° 4.5 mm 4
28 Sept. Overcast
Overcast
 16° /9° 3.4 mm 4
29 Sept. Mist
Mist
 15° /8° 26.1 mm 4
30 Sept. Mist
Mist
 17° /4° 2 mm 4
Next
Important Notice
Our weather forecast for Mission 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 Mission forecast closer to your planned date for the most up-to-date weather information.
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Mission in September - FAQ

What are the expected maximum and minimum temperatures in Mission during September?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Mission during September?
Significant rainfall exceeding 105.6 mm is expected in Mission during September, occurring over more than 12 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Mission during September?
The average wind speed in Mission during September is 8 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Mission

Explore the daily rainfall trends and prepare for Missions September weather 💧
Typically, Mission has 12 rainy days in September with a total of 105.6 mm of rainfall.

UV exposure in Mission during September

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

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Location coordinates Where is Mission?

Get accurate weather forecasts for Mission, located at latitude 49.133 and longitude -122.303. Stay updated with localized weather information tailored for Mission.

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