Climate and monthly weather forecastMonrovia, CA
Climate and monthly weather forecast
Weather in January
January, like December, in Monrovia, California, is another comfortable winter month, with an average temperature varying between 46.9°F (8.3°C) and 64°F (17.8°C). The beginning of January records an average high-temperature of a still comfortable 64°F (17.8°C), marking a negligible difference from December's 61.7°F (16.5°C). Weather in January »Weather in February
February, the last month of the winter in Monrovia, is another comfortable month, with an average temperature fluctuating between 64°F (17.8°C) and 46°F (7.8°C). With the arrival of February, Monrovia transitions to an average high temperature of a still comfortable 64°F (17.8°C), nearly identical to January's weather. Weather in February »Weather in March
March, the first month of the spring in Monrovia, is also an enjoyable month, with an average temperature fluctuating between 67.5°F (19.7°C) and 47.3°F (8.5°C). With the start of March, Monrovia measures an average high-temperature of a still refreshing 67.5°F (19.7°C), not significantly differing from February's 64°F (17.8°C). Weather in March »Weather in April
April in Monrovia, California, is an agreeable spring month, with temperature in the range of an average low of 49.6°F (9.8°C) and an average high of 72.1°F (22.3°C). Monrovia, California, marks the onset of April with an average high-temperature of a pleasant 72.1°F (22.3°C), subtly divergent from March's 67.5°F (19.7°C). Weather in April »Weather in May
May, the last month of the spring in Monrovia, is a warm month, with temperature in the range of an average high of 75.2°F (24°C) and an average low of 53.4°F (11.9°C). The advent of May denotes an average high-temperature of a warm 75.2°F (24°C), subtly different from April's 72.1°F (22.3°C). Weather in May »Weather in June
The first month of the summer, June, is also a moderately hot month in Monrovia, California, with temperature in the range of an average high of 81.5°F (27.5°C) and an average low of 57.7°F (14.3°C). Monrovia's June weather indicates a minor increase in high-temperatures, edging from May's warm 75.2°F (24°C) to a still moderately hot 81.5°F (27.5°C). Weather in June »Weather in July
July in Monrovia, California, is a hot summer month, with an average temperature ranging between max 86.9°F (30.5°C) and min 63.5°F (17.5°C). The start of July signals a slight increase in the average high-temperature, moving from a moderately hot 81.5°F (27.5°C) in June to a hot 86.9°F (30.5°C). Weather in July »Weather in August
The last month of the summer, August, is also a hot month in Monrovia, California, with temperature in the range of an average high of 88.2°F (31.2°C) and an average low of 64.8°F (18.2°C). August, marked by an average high-temperature of 88.2°F (31.2°C) and a low-temperature of 64.8°F (18.2°C), is the warmest month. The average heat index in August is estimated at a hot 89.6°F (32°C). Weather in August »Weather in September
September, the first month of the autumn in Monrovia, is also a moderately hot month, with an average temperature fluctuating between 62.8°F (17.1°C) and 85.5°F (29.7°C). The average high-temperature in September, at a moderately hot 85.5°F (29.7°C), reveals a modest deviation from August's 88.2°F (31.2°C). Weather in September »Weather in October
October, like September, in Monrovia, California, is a moderately hot autumn month, with an average temperature varying between 78.1°F (25.6°C) and 58.1°F (14.5°C). The onset of October results in a small decrease in the average high-temperature, moderately receding from 85.5°F (29.7°C) in September to a still warm 78.1°F (25.6°C). Weather in October »Weather in November
November, the last month of the autumn in Monrovia, is also an agreeable month, with an average temperature ranging between max 70°F (21.1°C) and min 52°F (11.1°C). The start of November comes with a small reduction in the average high-temperature, subtly receding from a moderately hot 78.1°F (25.6°C) in October to a pleasant 70°F (21.1°C). Weather in November »Weather in December
December, the first month of the winter in Monrovia, is still a comfortable month, with an average temperature varying between 61.7°F (16.5°C) and 45.7°F (7.6°C). The coldest month is December, with an average high-temperature of 61.7°F (16.5°C) and an average low-temperature of 45.7°F (7.6°C). Weather in December »Updated: Aug 4, 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
In Monrovia, during the entire year, the rain falls for 50.9 days and collects up to 8.46" (215mm) of precipitation.
January, February and December, with an average of 6.9h of sunshine, are months with the least sunshine.
The months with the most rainfall are February and December, with an average 1.77" (45mm) of precipitation.
March and May, with an average relative humidity of 56%, are most humid months.
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 1.1 days and typically collects 0.04" (1mm) of precipitation.
The month with the longest days is June, with an average of 14h and 24min of daylight.
The months with the highest UV index are June through September, with an average maximum UV index of 6.
July has the most sunshine of the year, with an average of 12.1h of sunshine.
August is the month when Monrovia's temperatures reach their peak, with averages of 88.2°F (31.2°C) and lows of 64.8°F (18.2°C).
With an average relative humidity of 46%, November is the least humid month.
December is the coldest month, exhibiting average temperatures of 61.7°F (16.5°C) at the peak and 45.7°F (7.6°C) at the base.
The month with the shortest days is December, with an average of 9h and 54min of daylight.
The month with the lowest UV index is December, with an average maximum UV index of 3.
Average temperature
Monrovia, CA
The warmest month (with the highest average high temperature) is August (88.2°F).
The month with the lowest average high temperature is December (61.7°F).
The month with the highest average low temperature is August (64.8°F).
The coldest month (with the lowest average low temperature) is December (45.7°F).
Average pressure
Monrovia, CA
- Average pressure in January:
30.11"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 (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed
Monrovia, CA
- Average wind speed in January:
5.5mph - Average wind speed in February:
5.1mph - Average wind speed in March:
5.2mph - Average wind speed in April:
5.8mph - Average wind speed in May:
5.7mph - Average wind speed in June:
5.3mph
- Average wind speed in July:
4.9mph - Average wind speed in August:
4.6mph - Average wind speed in September:
4.5mph - Average wind speed in October:
4.7mph - Average wind speed in November:
5mph - Average wind speed in December:
5.3mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity
Monrovia, CA
The months with the highest relative humidity are March and May (56%).
The month with the lowest relative humidity is November (46%).
Average rainfall
Monrovia, CA
- Average rainfall in January:
1.46" - Average rainfall in February:
1.77" - Average rainfall in March:
0.98" - Average rainfall in April:
0.67" - Average rainfall in May:
0.24" - Average rainfall in June:
0.04"
- Average rainfall in July:
0.2" - Average rainfall in August:
0.12" - Average rainfall in September:
0.12" - Average rainfall in October:
0.28" - Average rainfall in November:
0.83" - Average rainfall in December:
1.77"
The wettest months (with the highest rainfall) are February and December (1.77").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days
Monrovia, CA
- Average rainfall days in January:
5.8 days - Average rainfall days in February:
5.9 days - Average rainfall days in March:
7.4 days - Average rainfall days in April:
5.8 days - Average rainfall days in May:
3.6 days - Average rainfall days in June:
1.1 days
- Average rainfall days in July:
3.2 days - Average rainfall days in August:
1.9 days - Average rainfall days in September:
2.6 days - Average rainfall days in October:
3.2 days - Average rainfall days in November:
4.3 days - Average rainfall days in December:
6.1 days
The month with the highest number of rainy days is March (7.4 days).
The month with the least rainy days is June (1.1 days).
Average daylight / Average sunshine
Monrovia, 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:
6h and 54min - Average sunshine in February:
6h and 54min - Average sunshine in March:
8h and 48min - Average sunshine in April:
11h and 18min - Average sunshine in May:
11h and 42min - Average sunshine in June:
12h and 0min
- Average sunshine in July:
12h and 6min - Average sunshine in August:
12h and 0min - Average sunshine in September:
10h and 48min - Average sunshine in October:
8h and 42min - Average sunshine in November:
7h and 18min - Average sunshine in December:
6h and 54min
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
Monrovia, CA
- Average sunshine days in January:
24.6 days - Average sunshine days in February:
21 days - Average sunshine days in March:
23.2 days - Average sunshine days in April:
22.8 days - Average sunshine days in May:
26.1 days - Average sunshine days in June:
28.3 days
- Average sunshine days in July:
25.6 days - Average sunshine days in August:
27.8 days - Average sunshine days in September:
26.2 days - Average sunshine days in October:
26.1 days - Average sunshine days in November:
24.6 days - Average sunshine days in December:
24 days
The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (21 days).
Average UV index
Monrovia, CA
The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).
Average cloud cover
Monrovia, 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
Monrovia, 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).
