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United States weather

Weather in Mono County, California for September 2027

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

    Temperatures

  • In general, the average temperature in Mono County at the beginning of September is 20 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 17.4 °C by the end of September.

    • Rain 🌧️

  • With an average of 4 rainy days, Mono County experiences minimal rainfall in September.

    • More

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

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

Average dry days
26
Dry days
Average rainy days
4
Rainy days
Average snowy days
0
Snow days
Average temperatures
18°/5°
Temperatures
Average wind speed
19 km/h
Avg max wind
Average humidity
44 %
Avg humidity

Mono County Weather September

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

Temperatures trend during September in Mono County

See the weather trend as well as the moving average line

September weather in Mono County day by day

Click on a date for more information
August October
Date Weather Temperatures Rain Snow More
Sept. 1 Sunny
Sunny
 20° /8° 0 mm 0 cm
Sept. 2 Sunny
Sunny
 19° /6° 0 mm 0 cm
Sept. 3 Sunny
Sunny
 19° /6° 0 mm 0 cm
Sept. 4 Light rain
Light rain
 20° /6° 3.4 mm 0 cm
Sept. 5 Patchy rain possible
Patchy rain possible
 21° /8° 0 mm 0 cm
Sept. 6 Sunny
Sunny
 20° /7° 0 mm 0 cm
Sept. 7 Sunny
Sunny
 21° /6° 0 mm 0 cm
Sept. 8 Sunny
Sunny
 20° /6° 0 mm 0 cm
Sept. 9 Sunny
Sunny
 20° /6° 0 mm 0 cm
Sept. 10 Overcast
Overcast
 19° /6° 0.7 mm 0 cm
Sept. 11 Sunny
Sunny
 19° /5° 0 mm 0 cm
Sept. 12 Sunny
Sunny
 19° /4° 0 mm 0 cm
Sept. 13 Sunny
Sunny
 19° /4° 0 mm 0 cm
Sept. 14 Sunny
Sunny
 21° /4° 0 mm 0 cm
Sept. 15 Sunny
Sunny
 19° /4° 0 mm 0 cm
Sept. 16 Patchy rain possible
Patchy rain possible
 15° /3° 0.3 mm 0.1 cm
Sept. 17 Sunny
Sunny
 16° /3° 0 mm 0 cm
Sept. 18 Thundery outbreaks possible
Thundery outbreaks possible
 15° /3° 12.1 mm 0 cm
Sept. 19 Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
 14° /4° 11.7 mm 0 cm
Sept. 20 Thundery outbreaks possible
Thundery outbreaks possible
 17° /4° 0 mm 0 cm
Sept. 21 Light rain
Light rain
 16° /6° 3.2 mm 0 cm
Sept. 22 Partly cloudy
Partly cloudy
 18° /5° 0 mm 0 cm
Sept. 23 Sunny
Sunny
 19° /6° 0 mm 0 cm
Sept. 24 Sunny
Sunny
 19° /6° 0 mm 0 cm
Sept. 25 Patchy rain possible
Patchy rain possible
 16° /7° 1.6 mm 0 cm
Sept. 26 Sunny
Sunny
 18° /5° 0 mm 0 cm
Sept. 27 Sunny
Sunny
 18° /5° 0 mm 0 cm
Sept. 28 Light rain
Light rain
 15° /5° 4 mm 0 cm
Sept. 29 Sunny
Sunny
 17° /5° 0 mm 0 cm
Sept. 30 Cloudy
Cloudy
 17° /4° 0 mm 0 cm
Next
Important Notice
Our weather forecast for Mono 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 Mono County forecast closer to your planned date for the most up-to-date weather information.
Change Month
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Mono County in September - FAQ

What are the expected maximum and minimum temperatures in Mono County during September?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 5°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Mono County during September?
In September, Mono County can expect light to moderate rainfall, totaling 36.9 mm across approximately 4 days. Occasional showers are possible, and planning ahead for them could be helpful.

Will it snow in Mono County in September 2027?
Mono County typically sees 0.1 cm of snowfall during September.

What are the typical wind conditions in Mono County during September?
The average wind speed in Mono County during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.

Mono County snow forecast September 2027

Track daily snowfall levels and discover Mono County’s snowy potential this September ❄️

September rainfall patterns in Mono County

Explore the daily rainfall trends and prepare for Mono Countys September weather 💧
Typically, Mono County has 4 rainy days in September with a total of 36.9 mm of rainfall.

UV exposure in Mono County during September

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