Expand
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 Irwindale, California, is another comfortable winter month, with temperature in the range of an average low of 48.4°F (9.1°C) and an average high of 64.9°F (18.3°C). Irwindale's weather, upon January's arrival, documents an average high-temperature of a still comfortable 64.9°F (18.3°C), nearly identical to the prior month. Weather in January »
Weather in February
February, the last month of the winter in Irwindale, is another refreshing month, with an average temperature ranging between min 47.3°F (8.5°C) and max 64.8°F (18.2°C). A minor adjustment in Irwindale's average high-temperature is noted with the start of February, touching a still refreshing 64.8°F (18.2°C) from January's 64.9°F (18.3°C). Weather in February »
Weather in March
March, the first month of the spring in Irwindale, is still a refreshing month, with temperature in the range of an average low of 48.6°F (9.2°C) and an average high of 67.8°F (19.9°C). Entering March, Irwindale's average high-temperature reads a still comfortable 67.8°F (19.9°C), indicating a close resemblance to the previous month's climate. Weather in March »
Weather in April
April is a pleasant spring month in Irwindale, California, with an average temperature ranging between max 71.6°F (22°C) and min 51.3°F (10.7°C). April welcomes an average high-temperature of a pleasant 71.6°F (22°C), not much different from the preceding month. Weather in April »
Weather in May
The last month of the spring, May, is a moderately hot month in Irwindale, California, with an average temperature ranging between min 54°F (12.2°C) and max 74.7°F (23.7°C). The beginning of May records an average high-temperature of a moderately hot 74.7°F (23.7°C), marking a negligible difference from April's 71.6°F (22°C). Weather in May »
Weather in June
June, the first month of the summer in Irwindale, is also a moderately hot month, with an average temperature ranging between min 57.7°F (14.3°C) and max 80.2°F (26.8°C). The shift into June is accompanied by a modest temperature increase, with the average high-temperature edging up from a warm 74.7°F (23.7°C) in May to a still moderately hot 80.2°F (26.8°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Irwindale, California, with an average temperature ranging between min 63.5°F (17.5°C) and max 85.6°F (29.8°C). July's arrival sees a mild rise in the average high-temperature, transitioning from June's warm 80.2°F (26.8°C) to a still moderately hot 85.6°F (29.8°C). Weather in July »
Weather in August
August, the last month of the summer in Irwindale, is a tropical month, with an average temperature varying between 87.1°F (30.6°C) and 64.9°F (18.3°C). The warmest period tends to be August, when average temperatures fluctuate between a high of 87.1°F (30.6°C) and a low of 64.9°F (18.3°C). For August, the heat index is evaluated at a tropical 89.6°F (32°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Irwindale, California, with an average temperature ranging between max 85.3°F (29.6°C) and min 63.5°F (17.5°C). The dawn of September sees an average high-temperature of a warm 85.3°F (29.6°C), subtly contrasting with August's 87.1°F (30.6°C). Weather in September »
Weather in October
October, like September, in Irwindale, California, is a moderately hot autumn month, with temperature in the range of an average low of 58.5°F (14.7°C) and an average high of 78.3°F (25.7°C). October heralds a minor drop in average high-temperature, sliding from September's 85.3°F (29.6°C) to a still warm 78.3°F (25.7°C). Weather in October »
Weather in November
November, the last month of the autumn in Irwindale, is also an agreeable month, with an average temperature varying between 70.7°F (21.5°C) and 52.9°F (11.6°C). The arrival of November suggests a slight decrease in the average high-temperature, moving from a warm 78.3°F (25.7°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 refreshing month in Irwindale, California, with an average temperature ranging between min 47.3°F (8.5°C) and max 63.1°F (17.3°C). December, known for its average high temperature of 63.1°F (17.3°C) and an average low temperature of 47.3°F (8.5°C), is the coldest month. Weather in December »
Updated: Feb 10, 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 in Irwindale?
In Irwindale, during the entire year, the rain falls for 49.6 days and collects up to 8.11" (206mm) of precipitation.
When it does not snow in Irwindale?
In Irwindale, California, snow does not fall in January through November.
How many days does it snow in Irwindale?
In Irwindale, during the entire year, snow falls for 0.1 days.
What are the months with the least sunshine in Irwindale?
January, February and December, with an average of 6.9h of sunshine, are months with the least sunshine in Irwindale.
What is the month with the lowest UV index in Irwindale?
January through March, November and December, with an average maximum UV index of 4, are months with the lowest UV index in Irwindale.
What is the rainiest month in Irwindale?
The month with the most rainfall in Irwindale is February, when the rain falls for 5.8 days and typically aggregates up to 1.73" (44mm) of precipitation.
When is Daylight Saving Time (DST) in Irwindale?
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 Irwindale?
The months with the highest humidity in Irwindale, California, are May and June, with an average relative humidity of 57%.
What is the driest month in Irwindale?
The month with the least rainfall is June, when the rain falls for 1.2 days and typically collects 0.04" (1mm) of precipitation.
When are the longest days in Irwindale?
The month with the longest days in Irwindale, California, is June, with an average of 14h and 24min of daylight.
What is the month with the highest UV index in Irwindale?
June through September, with an average maximum UV index of 6, are months with the highest UV index.
What month has the most sunshine in Irwindale?
July has the most sunshine of the year, with an average of 12.1h of sunshine.
What is the hottest time of year in Irwindale?
Irwindale's temperatures tend to reach their peak averages in August, with a high of 87.1°F (30.6°C) and a low of 64.9°F (18.3°C).
What is the least humid month in Irwindale?
With an average relative humidity of 46%, November is the least humid month.
What are the coldest months in Irwindale?
December, with average temperatures reaching a high of 63.1°F (17.3°C) and a low of 47.3°F (8.5°C), is the coldest month in Irwindale.
When does it snow in Irwindale?
December is the only month when snow falls.
When does it snow the most in Irwindale?
The month with the most snowfall days in Irwindale, California, is December, when snow falls for 0.1 days.
What is the month with the shortest days in Irwindale?
The month with the shortest days in Irwindale, California, is December, with an average of 9h and 54min of daylight.
Average temperature
Irwindale, CA
The warmest month (with the highest average high temperature) is August (87.1°F).
The month with the lowest average high temperature is December (63.1°F).
The month with the highest average low temperature is August (64.9°F).
The coldest months (with the lowest average low temperature) are February and December (47.3°F).
Average pressure
Irwindale, CA
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.05"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.88"Hg
- Average pressure in July:
29.91"Hg - Average pressure in August:
29.89"Hg - Average pressure in September:
29.89"Hg - Average pressure in October:
29.95"Hg - Average pressure in November:
30.03"Hg - Average pressure in December:
30.08"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed
Irwindale, CA
- Average wind speed in January:
5.3mph - Average wind speed in February:
5mph - Average wind speed in March:
5.1mph - 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:
4.9mph - Average wind speed in August:
4.6mph - Average wind speed in September:
4.4mph - Average wind speed in October:
4.5mph - Average wind speed in November:
4.9mph - Average wind speed in December:
5.1mph
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 (4.4mph).
Average humidity
Irwindale, CA
The months with the highest relative humidity are May and June (57%).
The month with the lowest relative humidity is November (46%).
Average rainfall
Irwindale, CA
- Average rainfall in January:
1.42" - Average rainfall in February:
1.73" - Average rainfall in March:
0.98" - Average rainfall in April:
0.63" - 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:
0.12" - Average rainfall in October:
0.24" - Average rainfall in November:
0.79" - Average rainfall in December:
1.69"
The wettest month (with the highest rainfall) is February (1.73").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days
Irwindale, CA
- Average rainfall days in January:
5.7 days - Average rainfall days in February:
5.8 days - Average rainfall days in March:
6.5 days - Average rainfall days in April:
5.5 days - Average rainfall days in May:
3.7 days - Average rainfall days in June:
1.2 days
- Average rainfall days in July:
3.2 days - Average rainfall days in August:
2.2 days - Average rainfall days in September:
2.8 days - Average rainfall days in October:
3.4 days - Average rainfall days in November:
3.7 days - Average rainfall days in December:
5.9 days
The month with the highest number of rainy days is March (6.5 days).
The month with the least rainy days is June (1.2 days).
Average snowfall days
Irwindale, CA
- Average snowfall days in January:
0 days - Average snowfall days in February:
0 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:
0.1 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight / Average sunshine
Irwindale, 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:
6h and 5min - 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 4min - 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 months with the least sunshine are January, February and December (Average sunshine: 6h and 54min).
Average sunshine days
Irwindale, CA
- Average sunshine days in January:
24.8 days - Average sunshine days in February:
21.5 days - Average sunshine days in March:
23.8 days - Average sunshine days in April:
23.7 days - Average sunshine days in May:
26.2 days - Average sunshine days in June:
28.3 days
- Average sunshine days in July:
25.5 days - Average sunshine days in August:
26.9 days - Average sunshine days in September:
25.9 days - Average sunshine days in October:
26.5 days - Average sunshine days in November:
25.1 days - Average sunshine days in December:
24.1 days
The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (21.5 days).
Average UV index
Irwindale, CA
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover
Irwindale, CA
The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility
Irwindale, 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).
Irwindale, California, USA
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location