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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, in Rancho Cucamonga, California, is another enjoyable winter month, with temperature in the range of an average high of 64°F (17.8°C) and an average low of 46.2°F (7.9°C). January's advent notes a subtle adjustment in average high-temperature to a still enjoyable 64°F (17.8°C) from December. Weather in January »
Weather in February
The last month of the winter, February, is also an enjoyable month in Rancho Cucamonga, California, with an average temperature ranging between max 64°F (17.8°C) and min 45.3°F (7.4°C). With the arrival of February, an average high temperature of a still comfortable 64°F (17.8°C) is noted, consistent with that of January. Weather in February »
Weather in March
March, the first month of the spring in Rancho Cucamonga, is a pleasant month, with an average temperature ranging between max 68.4°F (20.2°C) and min 46.9°F (8.3°C). March ushers in an average high-temperature of an agreeable 68.4°F (20.2°C), aligning closely with the preceding month. Weather in March »
Weather in April
April, the same as March, in Rancho Cucamonga, California, is an agreeable spring month, with an average temperature ranging between min 50.5°F (10.3°C) and max 72.9°F (22.7°C). As April unfolds, the average high-temperature reaches a still pleasant 72.9°F (22.7°C), hinting at a slight fluctuation from the previous month. Weather in April »
Weather in May
May, the last month of the spring in Rancho Cucamonga, is a warm month, with an average temperature fluctuating between 53.6°F (12°C) and 76.6°F (24.8°C). Rancho Cucamonga measures an average high-temperature of a warm 76.6°F (24.8°C) in May, nearly consistent with the preceding month. Weather in May »
Weather in June
June, the first month of the summer in Rancho Cucamonga, is still a warm month, with an average temperature fluctuating between 84.7°F (29.3°C) and 58.6°F (14.8°C). June witnesses a subtle temperature ascent, adjusting from 76.6°F (24.8°C) in May to a still warm 84.7°F (29.3°C). Weather in June »
Weather in July
July in Rancho Cucamonga, California, is a hot summer month, with an average temperature ranging between min 64.8°F (18.2°C) and max 90.5°F (32.5°C). In Rancho Cucamonga, stepping into July brings a gentle temperature nudge, moving slightly up from June's moderately hot 84.7°F (29.3°C) to a tropical 90.5°F (32.5°C). Weather in July »
Weather in August
August, the last month of the summer in Rancho Cucamonga, is another tropical month, with an average temperature fluctuating between 91.8°F (33.2°C) and 66.6°F (19.2°C). August, with average temperatures reaching a high of 91.8°F (33.2°C) and a low of 66.6°F (19.2°C), is the warmest month. Throughout August, the heat index is appraised at a tropical 93.2°F (34°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a hot month in Rancho Cucamonga, California, with an average temperature ranging between max 88.3°F (31.3°C) and min 63.7°F (17.6°C). The arrival of September sees an average high-temperature of a still tropical 88.3°F (31.3°C), hardly diverging from August's 91.8°F (33.2°C). Weather in September »
Weather in October
October, like September, in Rancho Cucamonga, California, is a moderately hot autumn month, with an average temperature varying between 57.6°F (14.2°C) and 79.2°F (26.2°C). The shift from September to October involves a decrease in the average high-temperature, from a tropical 88.3°F (31.3°C) to a moderately hot 79.2°F (26.2°C). Weather in October »
Weather in November
November, the last month of the autumn in Rancho Cucamonga, is also an agreeable month, with temperature in the range of an average high of 70.7°F (21.5°C) and an average low of 50.9°F (10.5°C). In Rancho Cucamonga, the average high-temperature in November gently drops from a warm 79.2°F (26.2°C) in October to a pleasant 70.7°F (21.5°C). Weather in November »
Weather in December
The first month of the winter, December, is still a comfortable month in Rancho Cucamonga, California, with temperature in the range of an average low of 45.3°F (7.4°C) and an average high of 61.7°F (16.5°C). December, known for its average high temperature of 61.7°F (16.5°C) and an average low temperature of 45.3°F (7.4°C), is the coldest month. Weather in December »
Updated: Aug 22, 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
How many days does it rain?
Throughout the year, there are 42.3 rainfall days, and 4.53" (115mm) of precipitation is accumulated.
When it does not snow?
January, March through December are months without snowfall.
How many days does it snow?
In Rancho Cucamonga, during the entire year, snow falls for 0.1 days.
What are the most humid months?
The months with the highest humidity are February, March and May, with an average relative humidity of 53%.
What is the rainiest month in Rancho Cucamonga?
February is the month with the most rainfall in Rancho Cucamonga. Rain falls for 4.5 days and accumulates 0.98" (25mm) of precipitation.
When does it snow?
February is the only month when snow falls.
When does it snow the most?
The month with the most snowfall days is February, when snow falls for 0.1 days.
What is the month with the least sunshine?
The months with the least sunshine are February and December, with an average of 6.9h of sunshine.
When is Daylight Saving Time (DST)?
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.
What is the driest month?
The month with the least rainfall is June, when the rain falls for 0.9 days and typically collects 0.04" (1mm) of precipitation.
When are the longest days?
With an average of 14h and 24min of daylight, June has the longest days of the year.
What month has the most sunshine?
With an average of 12.1h of sunshine, July has the most sunshine of the year.
What are the months with the highest UV index?
The months with the highest UV index are July and August, with an average maximum UV index of 7.
What month is the hottest?
Rancho Cucamonga registers the average highest temperatures during August, with peaks of 91.8°F (33.2°C) and lows of 66.6°F (19.2°C).
What is the least humid month?
The least humid month is August, with an average relative humidity of 41%.
What are the coldest months?
Rancho Cucamonga's December weather reaches an average high of 61.7°F (16.5°C) and an average low of 45.3°F (7.4°C), making it the coldest month.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 54min of daylight.
What is the month with the lowest UV index?
December is the month with the lowest UV index, with an average maximum UV index of 3.
Average temperature
Rancho Cucamonga, CA
The warmest month (with the highest average high temperature) is August (91.8°F).
The month with the lowest average high temperature is December (61.7°F).
The month with the highest average low temperature is August (66.6°F).
The coldest months (with the lowest average low temperature) are February and December (45.3°F).
Average pressure
Rancho Cucamonga, CA
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.04"Hg - Average pressure in March:
30.02"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.9"Hg - Average pressure in June:
29.86"Hg
- Average pressure in July:
29.89"Hg - Average pressure in August:
29.88"Hg - Average pressure in September:
29.88"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 (29.86"Hg).
Average wind speed
Rancho Cucamonga, CA
- Average wind speed in January:
5.3mph - Average wind speed in February:
5mph - Average wind speed in March:
5.3mph - Average wind speed in April:
5.8mph - Average wind speed in May:
5.9mph - Average wind speed in June:
5.5mph
- Average wind speed in July:
5.1mph - Average wind speed in August:
4.8mph - Average wind speed in September:
4.5mph - Average wind speed in October:
4.8mph - Average wind speed in November:
5mph - Average wind speed in December:
5.2mph
The windiest month (with the highest average wind speed) is May (5.9mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity
Rancho Cucamonga, CA
The months with the highest relative humidity are February, March and May (53%).
The month with the lowest relative humidity is August (41%).
Average rainfall
Rancho Cucamonga, CA
- Average rainfall in January:
0.51" - Average rainfall in February:
0.98" - Average rainfall in March:
0.39" - Average rainfall in April:
0.47" - Average rainfall in May:
0.2" - Average rainfall in June:
0.04"
- Average rainfall in July:
0.16" - Average rainfall in August:
0.12" - Average rainfall in September:
0.08" - Average rainfall in October:
0.16" - Average rainfall in November:
0.51" - Average rainfall in December:
0.91"
The wettest month (with the highest rainfall) is February (0.98").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days
Rancho Cucamonga, CA
- Average rainfall days in January:
4.6 days - Average rainfall days in February:
4.5 days - Average rainfall days in March:
6.3 days - Average rainfall days in April:
5.4 days - Average rainfall days in May:
3.2 days - Average rainfall days in June:
0.9 days
- Average rainfall days in July:
2.8 days - Average rainfall days in August:
1.9 days - Average rainfall days in September:
1.8 days - Average rainfall days in October:
2.1 days - Average rainfall days in November:
3.3 days - Average rainfall days in December:
5.5 days
The month with the highest number of rainy days is March (6.3 days).
The month with the least rainy days is June (0.9 days).
Average snowfall days
Rancho Cucamonga, 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
Rancho Cucamonga, CA
- Average daylight in January:
10h and 1min - Average daylight in February:
11h and 0min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 0min - Average daylight in June:
14h and 2min
- Average daylight in July:
14h and 1min - Average daylight in August:
13h and 2min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 2min - Average daylight in November:
10h and 2min - Average daylight in December:
9h and 5min
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:
6h and 5min - Average sunshine in March:
9h and 1min - Average sunshine in April:
11h and 2min - Average sunshine in May:
11h and 5min - Average sunshine in June:
12h and 0min
- Average sunshine in July:
12h and 1min - Average sunshine in August:
12h and 0min - Average sunshine in September:
10h and 4min - Average sunshine in October:
8h and 5min - Average sunshine in November:
7h and 2min - Average sunshine in December:
6h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 54min).
Average sunshine days
Rancho Cucamonga, CA
- Average sunshine days in January:
25.8 days - Average sunshine days in February:
22.8 days - Average sunshine days in March:
24.6 days - Average sunshine days in April:
24 days - Average sunshine days in May:
26.2 days - Average sunshine days in June:
28.3 days
- Average sunshine days in July:
25.3 days - Average sunshine days in August:
26.8 days - Average sunshine days in September:
26 days - Average sunshine days in October:
27.4 days - Average sunshine days in November:
26 days - Average sunshine days in December:
24.4 days
The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (22.8 days).
Average UV index
Rancho Cucamonga, 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
Rancho Cucamonga, CA
The months with the most cloud cover are February and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility
Rancho Cucamonga, 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).
Rancho Cucamonga, California, USA
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