Climate and monthly weather forecastFontana, CA
Climate and monthly weather forecast
Weather in January
January, like December, in Fontana, California, is another enjoyable winter month, with an average temperature fluctuating between 63.1°F (17.3°C) and 45.3°F (7.4°C). January's advent presents an average high-temperature of a still refreshing 63.1°F (17.3°C), indicating a slight variation from the conditions of the previous month. Weather in January »Weather in February
The last month of the winter, February, is another refreshing month in Fontana, California, with an average temperature ranging between min 44.2°F (6.8°C) and max 63.3°F (17.4°C). The commencement of February brings an average high-temperature of a still comfortable 63.3°F (17.4°C), marking an inconsequential divergence from January. Weather in February »Weather in March
The first month of the spring, March, is still a comfortable month in Fontana, California, with an average temperature varying between 66.7°F (19.3°C) and 46°F (7.8°C). The advent of March brings an average high-temperature of a still comfortable 66.7°F (19.3°C), almost identical to the preceding month. Weather in March »Weather in April
April is a pleasant spring month in Fontana, California, with an average temperature fluctuating between 49.6°F (9.8°C) and 72°F (22.2°C). Fontana, California, marks the start of April with an average high-temperature of an agreeable 72°F (22.2°C), hinting at a slight fluctuation from March's 66.7°F (19.3°C). Weather in April »Weather in May
May, the last month of the spring in Fontana, is a moderately hot month, with an average temperature ranging between min 54°F (12.2°C) and max 76.6°F (24.8°C). Fontana starts May with an average high-temperature of a moderately hot 76.6°F (24.8°C), a minor shift from April's 72°F (22.2°C). Weather in May »Weather in June
June, the first month of the summer in Fontana, is still a warm month, with an average temperature ranging between max 85.3°F (29.6°C) and min 59.2°F (15.1°C). June's arrival brings a modest temperature shift, moving from a warm 76.6°F (24.8°C) in May to a still moderately hot 85.3°F (29.6°C). Weather in June »Weather in July
July is a tropical summer month in Fontana, California, with an average temperature varying between 91°F (32.8°C) and 65.8°F (18.8°C). July showcases a minor temperature ascent, adjusting from June's moderately hot 85.3°F (29.6°C) to a hot 91°F (32.8°C). Weather in July »Weather in August
August, the last month of the summer in Fontana, is another hot month, with an average temperature fluctuating between 92.1°F (33.4°C) and 67.3°F (19.6°C). With an average high-temperature of 92.1°F (33.4°C) and an average low-temperature of 67.3°F (19.6°C), August is the warmest month. Weather in August »Weather in September
September, the first month of the autumn in Fontana, is also a hot month, with an average temperature ranging between min 63.9°F (17.7°C) and max 88.3°F (31.3°C). As Fontana steps into September, the average high-temperature is measured at a still tropical 88.3°F (31.3°C), displaying minor differences from August's 92.1°F (33.4°C). Weather in September »Weather in October
October, the same as September, is another warm autumn month in Fontana, California, with temperature in the range of an average high of 78.8°F (26°C) and an average low of 57.2°F (14°C). A moderate decline in the average high-temperature is seen during October, decreasing from a tropical 88.3°F (31.3°C) in September to a warm 78.8°F (26°C). Weather in October »Weather in November
November, the last month of the autumn in Fontana, is also an agreeable month, with an average temperature ranging between max 69.3°F (20.7°C) and min 50.5°F (10.3°C). The onset of November comes with a shift in the average high-temperature, falling from a warm 78.8°F (26°C) in October to an agreeable 69.3°F (20.7°C). Weather in November »Weather in December
December, the first month of the winter in Fontana, is still a comfortable month, with an average temperature ranging between max 60.8°F (16°C) and min 44.2°F (6.8°C). With its high average temperature of 60.8°F (16°C) and a low of 44.2°F (6.8°C), December is regarded as the coldest month. Weather in December »Updated: Jun 27, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Throughout the year, in Fontana, there are 48.1 rainfall days, and 6.89" (175mm) of precipitation is accumulated.
January, March through December are months without snowfall.
In Fontana, during the entire year, snow falls for 0.1 days.
The months with the highest humidity are February, March and May, with an average relative humidity of 52%.
February is the month with the most rainfall. Rain falls for 6.2 days and accumulates 1.57" (40mm) of precipitation.
February is the only month when snow falls.
The month with the most snowfall days in Fontana is February, when snow falls for 0.1 days.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.
The month with the least rainfall is June, when the rain falls for 1.2 days and typically collects 0.04" (1mm) of precipitation.
With an average of 14h and 24min of daylight, June has the longest days of the year.
The months with the most sunshine are June through August, with an average of 12.1h of sunshine.
The months with the highest UV index are July and August, with an average maximum UV index of 7.
August is the month when Fontana sees the average highest temperatures, with a high of 92.1°F (33.4°C) and a low of 67.3°F (19.6°C).
The least humid month is August, with an average relative humidity of 39%.
During the coldest month in Fontana, December, temperatures average a high of 60.8°F (16°C) and a low of 44.2°F (6.8°C).
The month with the shortest days is December, with an average of 9h and 54min of daylight.
The month with the least sunshine is December, with an average of 6.9h of sunshine.
The month with the lowest UV index is December, with an average maximum UV index of 3.
Average temperature
Fontana, CA
The warmest month (with the highest average high temperature) is August (92.1°F).
The month with the lowest average high temperature is December (60.8°F).
The month with the highest average low temperature is August (67.3°F).
The coldest months (with the lowest average low temperature) are February and December (44.2°F).
Average pressure
Fontana, CA
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.04"Hg - Average pressure in March:
30.01"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.9"Hg - Average pressure in June:
29.85"Hg
- Average pressure in July:
29.88"Hg - Average pressure in August:
29.87"Hg - Average pressure in September:
29.87"Hg - Average pressure in October:
29.94"Hg - Average pressure in November:
30.03"Hg - Average pressure in December:
30.07"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed
Fontana, CA
- Average wind speed in January:
5.5mph - Average wind speed in February:
5.2mph - Average wind speed in March:
5.4mph - Average wind speed in April:
6mph - Average wind speed in May:
6mph - Average wind speed in June:
5.6mph
- Average wind speed in July:
5.2mph - Average wind speed in August:
4.8mph - Average wind speed in September:
4.5mph - Average wind speed in October:
4.9mph - Average wind speed in November:
5.2mph - Average wind speed in December:
5.3mph
The windiest months (with the highest average wind speed) are April and May (6mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity
Fontana, CA
The months with the highest relative humidity are February, March and May (52%).
The month with the lowest relative humidity is August (39%).
Average rainfall
Fontana, CA
- Average rainfall in January:
1.02" - Average rainfall in February:
1.57" - Average rainfall in March:
0.75" - Average rainfall in April:
0.63" - Average rainfall in May:
0.2" - Average rainfall in June:
0.04"
The wettest month (with the highest rainfall) is February (1.57").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days
Fontana, CA
- Average rainfall days in January:
5.6 days - Average rainfall days in February:
6.2 days - Average rainfall days in March:
7.5 days - Average rainfall days in April:
5.4 days - Average rainfall days in May:
3.6 days - Average rainfall days in June:
1.2 days
- Average rainfall days in July:
3.2 days - Average rainfall days in August:
1.7 days - Average rainfall days in September:
2.4 days - Average rainfall days in October:
2.2 days - Average rainfall days in November:
3.2 days - Average rainfall days in December:
5.9 days
The month with the highest number of rainy days is March (7.5 days).
The month with the least rainy days is June (1.2 days).
Average snowfall days
Fontana, CA
- Average snowfall days in January:
0 days - Average snowfall days in February:
0.1 days - Average snowfall days in March:
0 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0 days - Average snowfall days in December:
0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight / Average sunshine
Fontana, CA
- Average daylight in January:
10h and 12min - Average daylight in February:
11h and 0min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 6min - Average daylight in May:
14h and 0min - Average daylight in June:
14h and 24min
- Average daylight in July:
14h and 12min - Average daylight in August:
13h and 24min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 18min - Average daylight in November:
10h and 24min - Average daylight in December:
9h and 54min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in January:
7h and 0min - Average sunshine in February:
7h and 0min - Average sunshine in March:
8h and 54min - Average sunshine in April:
11h and 18min - Average sunshine in May:
11h and 48min - Average sunshine in June:
12h and 6min
- Average sunshine in July:
12h and 6min - Average sunshine in August:
12h and 6min - Average sunshine in September:
10h and 42min - Average sunshine in October:
9h and 0min - Average sunshine in November:
7h and 18min - Average sunshine in December:
6h and 54min
The months with the most sunshine are June, July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).
Average sunshine days
Fontana, CA
- Average sunshine days in January:
24 days - Average sunshine days in February:
21.1 days - Average sunshine days in March:
23.5 days - Average sunshine days in April:
24.3 days - Average sunshine days in May:
26.3 days - Average sunshine days in June:
28.3 days
- Average sunshine days in July:
25.8 days - Average sunshine days in August:
27.2 days - Average sunshine days in September:
25.9 days - Average sunshine days in October:
28 days - Average sunshine days in November:
26.3 days - Average sunshine days in December:
23.8 days
The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (21.1 days).
Average UV index
Fontana, CA
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover
Fontana, CA
The months with the most cloud cover are February, March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 4).
Average visibility
Fontana, CA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
