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United States weather

Weather in Rancho Cucamonga, California for January 2027

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

    Temperatures

  • In general, the average temperature in Rancho Cucamonga at the beginning of January is 14.9 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 17.7 °C by the end of January.

    • Rain 🌧️

  • With an average of 4 rainy days, Rancho Cucamonga experiences minimal rainfall in January.

    • More

  • Is January a good time to visit Rancho Cucamonga? check out the best time to travel to Rancho Cucamonga page.

  • ✨ Is January a good time to visit Rancho Cucamonga? – Ask the AI Weatherman

Average dry days
27
Dry days
Average rainy days
4
Rainy days
Average snowy days
0
Snow days
Average temperatures
17°/7°
Temperatures
Average wind speed
11 km/h
Avg max wind
Average humidity
48 %
Avg humidity

Rancho Cucamonga Weather January

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

Temperatures trend during January in Rancho Cucamonga

See the weather trend as well as the moving average line

January weather in Rancho Cucamonga day by day

Click on a date for more information
December February
Date Weather Temperatures Rain UV More
Jan. 1 Heavy rain
Heavy rain
 16° /8° 78.2 mm 2.9
Jan. 2 Light rain
Light rain
 18° /9° 2.9 mm 2.9
Jan. 3 Moderate rain
Moderate rain
 13° /9° 10.3 mm 2
Jan. 4 Heavy rain
Heavy rain
 14° /7° 30.3 mm 2.9
Jan. 5 Moderate rain
Moderate rain
 15° /7° 11.1 mm 2.9
Jan. 6 Sunny
Sunny
 16° /6° 0 mm 2.9
Jan. 7 Patchy rain possible
Patchy rain possible
 12° /5° 0.6 mm 2
Jan. 8 Cloudy
Cloudy
 13° /4° 0.1 mm 3
Jan. 9 Sunny
Sunny
 16° /5° 0 mm 3
Jan. 10 Sunny
Sunny
 16° /5° 0 mm 3
Jan. 11 Sunny
Sunny
 16° /5° 0 mm 3
Jan. 12 Sunny
Sunny
 16° /5° 0 mm 3.1
Jan. 13 Sunny
Sunny
 17° /6° 0 mm 3
Jan. 14 Sunny
Sunny
 18° /7° 0 mm 3.2
Jan. 15 Sunny
Sunny
 19° /8° 0 mm 3
Jan. 16 Sunny
Sunny
 21° /8° 0 mm 3.2
Jan. 17 Partly cloudy
Partly cloudy
 15° /7° 0 mm 3
Jan. 18 Sunny
Sunny
 20° /8° 0 mm 3.3
Jan. 19 Sunny
Sunny
 20° /9° 0 mm 3
Jan. 20 Patchy rain possible
Patchy rain possible
 18° /8° 1.5 mm 3
Jan. 21 Light rain
Light rain
 14° /8° 4 mm 2
Jan. 22 Light rain
Light rain
 15° /9° 9.3 mm 3
Jan. 23 Patchy rain possible
Patchy rain possible
 15° /8° 0 mm 3
Jan. 24 Patchy rain possible
Patchy rain possible
 17° /6° 1.6 mm 3.5
Jan. 25 Overcast
Overcast
 15° /6° 0 mm 3
Jan. 26 Light rain
Light rain
 14° /6° 7.2 mm 3
Jan. 27 Light rain
Light rain
 17° /7° 7.4 mm 3
Jan. 28 Overcast
Overcast
 17° /8° 0 mm 3
Jan. 29 Overcast
Overcast
 19° /8° 0 mm 3
Jan. 30 Overcast
Overcast
 20° /10° 0 mm 3
Jan. 31 Partly cloudy
Partly cloudy
 21° /9° 0 mm 3.9
Next
Important Notice
Our weather forecast for Rancho Cucamonga in January 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 January - FAQ

What are the expected maximum and minimum temperatures in Rancho Cucamonga during January?
Enjoy moderate daytime temperatures of up to 17° and cooler nights around 7°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Rancho Cucamonga during January?
Significant rainfall exceeding 164.6 mm is expected in Rancho Cucamonga during January, occurring over more than 4 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Rancho Cucamonga during January?
The average wind speed in Rancho Cucamonga during January is 11 km/h, suggesting breezy to windy conditions, depending on your activities.

January rainfall patterns in Rancho Cucamonga

Explore the daily rainfall trends and prepare for Rancho Cucamongas January weather 💧
Typically, Rancho Cucamonga has 4 rainy days in January with a total of 164.6 mm of rainfall.

UV exposure in Rancho Cucamonga during January

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