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Weather in Rancho Cucamonga, California for October 2026

Your guide to Rancho Cucamonga weather in October - trends and predictions

    Temperatures

  • In general, the average temperature in Rancho Cucamonga at the beginning of October is 31 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 24.6 °F by the end of October.

    • Rain 🌧️

  • Precipitation in Rancho Cucamonga during October 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
31
Dry days
Average rainy days
0
Rainy days
Average snowy days
0
Snow days
Average temperatures
28°/16°
Temperatures
Average wind speed
13 km/h
Avg max wind
Average humidity
38 %
Avg humidity

Rancho Cucamonga Weather October

Move between months or click on a day
September
November
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Patchy rain possible
27°
2
Partly cloudy
29°
3
Sunny
29°
4
Sunny
32°
5
Sunny
33°
6
Sunny
33°
7
Sunny
34°
8
Sunny
33°
9
Overcast
31°
10
Sunny
30°
11
Sunny
27°
12
Sunny
28°
13
Overcast
24°
14
Overcast
22°
15
Partly cloudy
26°
16
Sunny
27°
17
Cloudy
26°
18
Sunny
30°
19
Sunny
30°
20
Sunny
32°
21
Sunny
29°
22
Partly cloudy
21°
23
Thundery outbreaks possible
27°
24
Partly cloudy
27°
25
Partly cloudy
24°
26
Patchy rain possible
25°
27
Cloudy
26°
28
Sunny
24°
29
Sunny
24°
30
Sunny
25°
31
Sunny
24°

Temperatures trend during October in Rancho Cucamonga

See the weather trend as well as the moving average line

October weather in Rancho Cucamonga day by day

Click on a date for more information
September November
Date Weather Temperatures Rain UV More
Oct. 1 Patchy rain possible
Patchy rain possible
 27° /16° 0.1 mm 6
Oct. 2 Partly cloudy
Partly cloudy
 29° /15° 0 mm 7
Oct. 3 Sunny
Sunny
 29° /17° 0 mm 7
Oct. 4 Sunny
Sunny
 32° /17° 0 mm 8
Oct. 5 Sunny
Sunny
 33° /18° 0 mm 8
Oct. 6 Sunny
Sunny
 33° /20° 0 mm 8
Oct. 7 Sunny
Sunny
 34° /20° 0 mm 8
Oct. 8 Sunny
Sunny
 33° /19° 0 mm 8
Oct. 9 Overcast
Overcast
 31° /20° 10 mm 7
Oct. 10 Sunny
Sunny
 30° /19° 0 mm 8
Oct. 11 Sunny
Sunny
 27° /17° 0 mm 7
Oct. 12 Sunny
Sunny
 28° /15° 0 mm 7
Oct. 13 Overcast
Overcast
 24° /14° 0 mm 6
Oct. 14 Overcast
Overcast
 22° /12° 20 mm 5
Oct. 15 Partly cloudy
Partly cloudy
 26° /13° 0 mm 6
Oct. 16 Sunny
Sunny
 27° /13° 0 mm 7
Oct. 17 Cloudy
Cloudy
 26° /15° 0 mm 6
Oct. 18 Sunny
Sunny
 30° /15° 0 mm 7
Oct. 19 Sunny
Sunny
 30° /16° 0 mm 8
Oct. 20 Sunny
Sunny
 32° /17° 0 mm 8
Oct. 21 Sunny
Sunny
 29° /16° 0 mm 7
Oct. 22 Partly cloudy
Partly cloudy
 21° /13° 0 mm 6
Oct. 23 Thundery outbreaks possible
Thundery outbreaks possible
 27° /14° 0.1 mm 7
Oct. 24 Partly cloudy
Partly cloudy
 27° /14° 0 mm 6
Oct. 25 Partly cloudy
Partly cloudy
 24° /14° 0 mm 6
Oct. 26 Patchy rain possible
Patchy rain possible
 25° /13° 0 mm 6
Oct. 27 Cloudy
Cloudy
 26° /13° 0 mm 6
Oct. 28 Sunny
Sunny
 24° /13° 0 mm 6
Oct. 29 Sunny
Sunny
 24° /11° 0 mm 6
Oct. 30 Sunny
Sunny
 25° /11° 0 mm 6
Oct. 31 Sunny
Sunny
 24° /10° 0 mm 7
Next
Important Notice
Our weather forecast for Rancho Cucamonga in October 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 Rancho Cucamonga forecast closer to your planned date for the most up-to-date weather information.
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Rancho Cucamonga in October - FAQ

What are the expected maximum and minimum temperatures in Rancho Cucamonga during October?
During October, expect a variety of temperatures with highs around 28° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Rancho Cucamonga during October?
Rainfall in Rancho Cucamonga during October is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 0 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 Rancho Cucamonga during October?
The average wind speed in Rancho Cucamonga during October is 13 km/h, suggesting breezy to windy conditions, depending on your activities.

October rainfall patterns in Rancho Cucamonga

Explore the daily rainfall trends and prepare for Rancho Cucamongas October weather 💧

UV exposure in Rancho Cucamonga during October

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

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Location coordinates Where is Rancho Cucamonga?

Get accurate weather forecasts for Rancho Cucamonga, located at latitude 34.106 and longitude -117.593. Stay updated with localized weather information tailored for Rancho Cucamonga.

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