easeweather.com
Fontana (CA)
Akron (OH)Albuquerque (NM)Alexandria (VA)Anaheim (CA)Anchorage (AK)Arlington (VA)Asheville (NC)Atlanta (GA)Atlantic City (NJ)Austin (TX)Baltimore (MD)Baton Rouge (LA)Birmingham (AL)Boston (MA)Brooklyn (NY)Buffalo (NY)Cape Coral (FL)Charlotte (NC)Chattanooga (TN)Chicago (IL)Cincinnati (OH)Cleveland (OH)Colorado Springs (CO)Columbus (OH)Corpus Christi (TX)Dallas (TX)Dayton (OH)Denver (CO)Des Moines (IA)Detroit (MI)El Paso (TX)Fairbanks (AK)
Fontana (CA)
Fort Lauderdale (FL)Fort Wayne (IN)Fort Worth (TX)Gatlinburg (TN)Grand Rapids (MI)Harrisburg (PA)Honolulu (HI)Houston (TX)Huntsville (AL)Indianapolis (IN)Jackson (MS)Jacksonville (FL)Juneau (AK)Kansas City (MO)Ketchikan (AK)Key West (FL)Knoxville (TN)Las Vegas (NV)Lexington (KY)Lincoln (NE)Little Rock (AR)Los Angeles (CA)Louisville (KY)Madison (WI)Manhattan (NY)Memphis (TN)Miami (FL)Milwaukee (WI)Minneapolis (MN)Mobile (AL)Montgomery (AL)Nashville (TN)New Orleans (LA)New York City (NY)Newark (NJ)Norfolk (VA)Oklahoma City (OK)Omaha (NE)Orlando (FL)Philadelphia (PA)Phoenix (AZ)Pittsburgh (PA)Portland (OR)Richmond (VA)Riverside (CA)Sacramento (CA)Salt Lake City (UT)San Antonio (TX)San Diego (CA)San Francisco (CA)San Jose (CA)Savannah (GA)Seattle (WA)Skagway (AK)Springfield (MO)St. Louis (MO)St. Petersburg (FL)Tallahassee (FL)Tampa (FL)Toledo (OH)Traverse City (MI)Tulsa (OK)Tyler (TX)Vancouver (WA)Virginia Beach (VA)WashingtonWichita (KS)Winston-Salem (NC) More Locations
United States weather

Weather in Fontana, California for December 2025

Your guide to Fontana weather in December - trends and predictions

    Temperatures

  • So far, December 2025 in Fontana is slightly warmer than the historical average by 1.4 °F.

  • Expect cooler weather in the next days in Fontana with the forecast suggesting a temperature of 18.1 °F, lower than the historical average.

  • In general, the average temperature in Fontana at the beginning of December is 20.4 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.3 °F by the end of December.

    • Rain 🌧️

  • Fontana experiences moderate rainfall in December, with an average of 6 rainy days and a total precipitation of 19.1 mm.

    • More

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

Average dry days
25
Dry days
Average rainy days
6
Rainy days
Average snowy days
0
Snow days
Average temperatures
18°/9°
Temperatures
Average wind speed
8 km/h
Avg max wind
Average humidity
39 %
Avg humidity

Fontana Weather December

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

Temperatures trend during December in Fontana

See the weather trend as well as the moving average line

December weather in Fontana day by day

Click on a date for more information
November January
Date Weather Temperatures Rain UV More
Dec. 1 Sunny
Sunny
 19° /8° 0 mm 5
Dec. 2 Sunny
Sunny
 18° /8° 0 mm 5
Dec. 3 Sunny
Sunny
 19° /8° 0 mm 5
Dec. 4 Sunny
Sunny
 21° /10° 0 mm 5
Dec. 5 Sunny
Sunny
 23° /9° 0 mm 6
Dec. 6 Sunny
Sunny
 22° /12° 0 mm 6
Dec. 7 Sunny
Sunny
 21° /10° 0 mm 6
Dec. 8 Sunny
Sunny
 21° /10° 0 mm 5
Dec. 9 Sunny
Sunny
 20° /8° 0 mm 6
Dec. 10 Sunny
Sunny
 23° /8° 0 mm 6
Dec. 11 Overcast
Overcast
 21° /12° 0 mm 5
Dec. 12 Sunny
Sunny
 18° /10° 0 mm 5
Dec. 13 Sunny
Sunny
 18° /8° 0 mm 5
Dec. 14 Cloudy
Cloudy
 20° /10° 0 mm 5
Dec. 15 Sunny
Sunny
 22° /10° 0 mm 6
Dec. 16 Sunny
Sunny
 23° /11° 0 mm 6
Dec. 17 Sunny
Sunny
 25° /11° 0 mm 0.7
Dec. 18 Sunny
Sunny
 30° /11° 0 mm 0.7
Dec. 19 Sunny
Sunny
 23° /16° 0 mm 0.6
Dec. 20 Sunny
Sunny
 21° /14° 0 mm 0.6
Dec. 21 Sunny
Sunny
 20° /14° 0 mm 0.6
Dec. 22 Sunny
Sunny
 22° /12° 0 mm 0
Dec. 23 Patchy rain possible
Patchy rain possible
 18° /14° 0.2 mm 4
Dec. 24 Moderate rain
Moderate rain
 15° /13° 8.4 mm 3
Dec. 25 Moderate rain
Moderate rain
 15° /11° 13.9 mm 3
Dec. 26 Moderate rain
Moderate rain
 11° /8° 7.7 mm 2
Dec. 27 Moderate rain
Moderate rain
 10° /5° 5.6 mm 2
Dec. 28 Partly cloudy
Partly cloudy
 12° /5° 0 mm 3
Dec. 29 Sunny
Sunny
 14° /8° 0 mm 4
Dec. 30 Sunny
Sunny
 17° /7° 0 mm 4
Dec. 31 Light rain shower
Light rain shower
 14° /7° 2 mm 4
Next
Important Notice
Our weather forecast for Fontana in December 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 Fontana forecast closer to your planned date for the most up-to-date weather information.
Change Month
‹
›

Fontana in December - FAQ

What are the expected maximum and minimum temperatures in Fontana during December?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 9°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Fontana during December?
Expect minimal rainfall in Fontana during December, with a total of 19.1 mm over approximately 6 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Fontana during December?
The average wind speed in Fontana during December is 8 km/h, suggesting breezy to windy conditions, depending on your activities.

December rainfall patterns in Fontana

Explore the daily rainfall trends and prepare for Fontanas December weather 💧
Typically, Fontana has 6 rainy days in December with a total of 19.1 mm of rainfall.

UV exposure in Fontana during December

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

Quick links

More Fontana weather pages
You are here
Location coordinates Where is Fontana?

Get accurate weather forecasts for Fontana, located at latitude 34.092 and longitude -117.435. Stay updated with localized weather information tailored for Fontana.

Found a mistake?
We appreciate your attention to details. Tell us here.