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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 daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, in Walnut, California, is another refreshing winter month, with an average temperature varying between 66°F (18.9°C) and 48.7°F (9.3°C). Walnut's January average high-temperature settles at a still comfortable 66°F (18.9°C), showing a near match with the preceding month. Weather in January »
Weather in February
February, the last month of the winter in Walnut, is another refreshing month, with an average temperature ranging between max 65.5°F (18.6°C) and min 47.7°F (8.7°C). February experiences an average high-temperature of a still comfortable 65.5°F (18.6°C), barely different from January's 66°F (18.9°C). Weather in February »
Weather in March
The first month of the spring, March, is an agreeable month in Walnut, California, with an average temperature varying between 49.3°F (9.6°C) and 69.3°F (20.7°C). Walnut sees the arrival of March with an average high-temperature of an agreeable 69.3°F (20.7°C), indicating a subtle variation from February. Weather in March »
Weather in April
April, like March, is another pleasant spring month in Walnut, California, with temperature in the range of an average low of 52.2°F (11.2°C) and an average high of 73.2°F (22.9°C). Walnut, California, indicates an average high-temperature of a still pleasant 73.2°F (22.9°C) in April, showing minor variation from March's 69.3°F (20.7°C). Weather in April »
Weather in May
May, the last month of the spring in Walnut, is a moderately hot month, with an average temperature varying between 75.7°F (24.3°C) and 55°F (12.8°C). With May's advent, Walnut sees an average high-temperature of a warm 75.7°F (24.3°C), subtly shifted from April's 73.2°F (22.9°C). Weather in May »
Weather in June
June, the first month of the summer in Walnut, is also a moderately hot month, with temperature in the range of an average high of 81.7°F (27.6°C) and an average low of 58.8°F (14.9°C). With the onset of June, the average high-temperature subtly transitions from a moderately hot 75.7°F (24.3°C) in May to a still warm 81.7°F (27.6°C). Weather in June »
Weather in July
July is a hot summer month in Walnut, California, with temperature in the range of an average low of 64.6°F (18.1°C) and an average high of 87.8°F (31°C). The shift into July is accompanied by a modest temperature increase, with the average high-temperature edging up from a moderately hot 81.7°F (27.6°C) in June to a hot 87.8°F (31°C). Weather in July »
Weather in August
The last month of the summer, August, is another tropical month in Walnut, California, with an average temperature ranging between max 89.2°F (31.8°C) and min 66.2°F (19°C). In Walnut, August is identified by the highest average temperatures, reaching a peak of 89.2°F (31.8°C) and a low of 66.2°F (19°C). In August, the heat index is computed to be a hot 91.4°F (33°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a hot month in Walnut, California, with an average temperature fluctuating between 87.3°F (30.7°C) and 64.4°F (18°C). The shift to September signals an average high-temperature of a still tropical 87.3°F (30.7°C), subtly varied from August's 89.2°F (31.8°C). Weather in September »
Weather in October
October, the same as September, is a moderately hot autumn month in Walnut, California, with an average temperature fluctuating between 59.5°F (15.3°C) and 79.3°F (26.3°C). With the commencement of October, Walnut records a moderate temperature decline, with the average high easing from September's tropical 87.3°F (30.7°C) to a warm 79.3°F (26.3°C). Weather in October »
Weather in November
November, the last month of the autumn in Walnut, is also an agreeable month, with temperature in the range of an average low of 53.6°F (12°C) and an average high of 71.8°F (22.1°C). The arrival of November suggests a slight decrease in the average high-temperature, moving from a warm 79.3°F (26.3°C) in October to a pleasant 71.8°F (22.1°C). Weather in November »
Weather in December
The first month of the winter, December, is still a refreshing month in Walnut, California, with an average temperature fluctuating between 63.7°F (17.6°C) and 47.7°F (8.7°C). In Walnut, December is the month with the lowest recorded average temperatures, measuring a high of 63.7°F (17.6°C) and a low of 47.7°F (8.7°C). Weather in December »
[Resources]Frequently asked questions
How much does it rain in Walnut?
Throughout the year, in Walnut, there are 43.1 rainfall days, and 6.89" (175mm) of precipitation is accumulated.
When is the lowest UV index in Walnut?
January, February, November and December, with an average maximum UV index of 4, are months with the lowest UV index in Walnut, California.
What is the month with the least sunshine in Walnut?
The month with the least sunshine is February, with an average of 6.8h of sunshine.
When is Daylight Saving Time (DST) in Walnut?
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 most humid month in Walnut?
May and June, with an average relative humidity of 56%, are most humid months.
What is the driest month in Walnut?
June and August are months with the least rain when the rain falls for 1 days and typically aggregates up to 0.04" (1mm) of rain.
When are the longest days in Walnut?
June has the longest days of the year in Walnut, with an average of 14h and 24min of daylight.
What month has the most sunshine in Walnut?
July has the most sunshine of the year in Walnut, with an average of 12.1h of sunshine.
When is the highest UV index in Walnut?
July and August, with an average maximum UV index of 7, are months with the highest UV index in Walnut.
What month is the hottest in Walnut?
Walnut's warmest month, August, generally records average temperatures ranging from a high of 89.2°F (31.8°C) to a low of 66.2°F (19°C).
What is the least humid month in Walnut?
With an average relative humidity of 45%, November is the least humid month.
What are the coldest months in Walnut?
In Walnut, December is the month with the lowest recorded average temperatures, measuring a high of 63.7°F (17.6°C) and a low of 47.7°F (8.7°C).
What is the wettest month in Walnut?
The month with the most rainfall in Walnut is December, when the rain falls for 5.4 days and typically aggregates up to 1.57" (40mm) of precipitation.
What is the month with the shortest days in Walnut?
The month with the shortest days in Walnut is December, with an average of 9h and 54min of daylight.
Average temperature
Walnut, CA
The warmest month (with the highest average high temperature) is August (89.2°F).
The month with the lowest average high temperature is December (63.7°F).
The month with the highest average low temperature is August (66.2°F).
The coldest months (with the lowest average low temperature) are February and December (47.7°F).
Average pressure
Walnut, CA
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.05"Hg - Average pressure in March:
30.02"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.91"Hg - Average pressure in June:
29.87"Hg
- Average pressure in July:
29.9"Hg - Average pressure in August:
29.89"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 (29.87"Hg).
Average wind speed
Walnut, CA
- Average wind speed in January:
5.2mph - Average wind speed in February:
4.8mph - Average wind speed in March:
5mph - Average wind speed in April:
5.7mph - Average wind speed in May:
5.7mph - Average wind speed in June:
5.2mph
- Average wind speed in July:
5mph - Average wind speed in August:
4.7mph - Average wind speed in September:
4.5mph - Average wind speed in October:
4.6mph - Average wind speed in November:
4.8mph - Average wind speed in December:
5mph
The windiest months (with the highest average wind speed) are April and May (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity
Walnut, CA
The months with the highest relative humidity are May and June (56%).
The month with the lowest relative humidity is November (45%).
Average rainfall
Walnut, CA
- Average rainfall in January:
1.22" - Average rainfall in February:
1.5" - Average rainfall in March:
0.83" - Average rainfall in April:
0.55" - Average rainfall in May:
0.16" - Average rainfall in June:
0.04"
- Average rainfall in July:
0.12" - Average rainfall in August:
0.04" - Average rainfall in September:
0.08" - Average rainfall in October:
0.16" - Average rainfall in November:
0.63" - Average rainfall in December:
1.57"
The wettest month (with the highest rainfall) is December (1.57").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days
Walnut, CA
- Average rainfall days in January:
4.5 days - Average rainfall days in February:
5.5 days - Average rainfall days in March:
6.6 days - Average rainfall days in April:
5.1 days - Average rainfall days in May:
3.2 days - Average rainfall days in June:
1 days
- Average rainfall days in July:
2.4 days - Average rainfall days in August:
1.4 days - Average rainfall days in September:
2.1 days - Average rainfall days in October:
2.7 days - Average rainfall days in November:
3.2 days - Average rainfall days in December:
5.4 days
The month with the highest number of rainy days is March (6.6 days).
The month with the least rainy days is June (1 days).
Average daylight / Average sunshine
Walnut, 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:
13h and 5min - 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:
8h and 5min - Average sunshine in April:
11h and 2min - Average sunshine in May:
11h and 3min - 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 5min - Average sunshine in October:
8h and 4min - 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 month with the least sunshine is February (Average sunshine: 6h and 48min).
Average sunshine days
Walnut, CA
- Average sunshine days in January:
25.8 days - Average sunshine days in February:
22 days - Average sunshine days in March:
24.3 days - Average sunshine days in April:
24.1 days - Average sunshine days in May:
26.9 days - Average sunshine days in June:
28.6 days
- Average sunshine days in July:
27 days - Average sunshine days in August:
28 days - Average sunshine days in September:
26.7 days - Average sunshine days in October:
27 days - Average sunshine days in November:
25.8 days - Average sunshine days in December:
24.4 days
The month with the most sunshine days is June (28.6 days).
The month with the least sunshine days is February (22 days).
Average UV index
Walnut, CA
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover
Walnut, 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 5).
Average visibility
Walnut, 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).
Walnut, California, USA
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