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 daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, in Portola Hills, California, is another refreshing winter month, with an average temperature ranging between min 50°F (10°C) and max 65.1°F (18.4°C). Portola Hills's weather in January, with an average high-temperature of a still refreshing 65.1°F (18.4°C), subtly shifts from December's 63.1°F (17.3°C). Weather in January »
Weather in February
The last month of the winter, February, is another comfortable month in Portola Hills, California, with an average temperature varying between 48.7°F (9.3°C) and 64.2°F (17.9°C). Portola Hills sees the arrival of February with an average high-temperature of a still enjoyable 64.2°F (17.9°C), indicating a subtle variation from January. Weather in February »
Weather in March
March, the first month of the spring in Portola Hills, is still a comfortable month, with an average temperature varying between 50.2°F (10.1°C) and 66.2°F (19°C). With the onset of March, a modest change to a still enjoyable 66.2°F (19°C) from February's 64.2°F (17.9°C) is noted in high-temperature. Weather in March »
Weather in April
April in Portola Hills, California, is an agreeable spring month, with temperature in the range of an average low of 52.5°F (11.4°C) and an average high of 69.3°F (20.7°C). The transition into April marks the average high-temperature at a pleasant 69.3°F (20.7°C), differing minimally from March's 66.2°F (19°C). Weather in April »
Weather in May
May, the last month of the spring in Portola Hills, is also an agreeable month, with an average temperature ranging between min 55.2°F (12.9°C) and max 70.9°F (21.6°C). The transition into May notes an average high-temperature of a still pleasant 70.9°F (21.6°C), revealing a mild distinction from the 69.3°F (20.7°C) in April. Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Portola Hills, California, with an average temperature ranging between min 57.7°F (14.3°C) and max 75.4°F (24.1°C). May's transformation into June witnesses an average high-temperature of a warm 75.4°F (24.1°C), noting a minor change from the preceding month. Weather in June »
Weather in July
July, like June, in Portola Hills, California, is another warm summer month, with an average temperature fluctuating between 63°F (17.2°C) and 80.4°F (26.9°C). An average high-temperature of a still moderately hot 80.4°F (26.9°C) marks July, exhibiting a close resemblance to the conditions in June. Weather in July »
Weather in August
August, the last month of the summer in Portola Hills, is another warm month, with an average temperature fluctuating between 64.4°F (18°C) and 82°F (27.8°C). Portola Hills witnesses the warmest weather in August, with temperatures averaging a high of 82°F (27.8°C) and a low of 64.4°F (18°C). The heat index in August is appraised at 84.2°F (29°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Portola Hills, California, with an average temperature varying between 63.7°F (17.6°C) and 81°F (27.2°C). In the transition from August to September, Portola Hills reports an average high-temperature of a still moderately hot 81°F (27.2°C), indicating a close resemblance to the prior month. Weather in September »
Weather in October
October, like September, in Portola Hills, California, is another warm autumn month, with an average temperature ranging between max 75.9°F (24.4°C) and min 59.9°F (15.5°C). October's arrival registers an average high-temperature of a still warm 75.9°F (24.4°C), closely aligning with the temperature of the previous month. Weather in October »
Weather in November
November, the last month of the autumn in Portola Hills, is another pleasant month, with an average temperature fluctuating between 70°F (21.1°C) and 54.7°F (12.6°C). With the arrival of November, Portola Hills experiences a modest decline in average high-temperatures, transitioning from a moderately hot 75.9°F (24.4°C) in October to an agreeable 70°F (21.1°C). Weather in November »
Weather in December
The first month of the winter, December, is also an enjoyable month in Portola Hills, California, with an average temperature ranging between max 63.1°F (17.3°C) and min 49.5°F (9.7°C). December, with average temperatures reaching a high of 63.1°F (17.3°C) and a low of 49.5°F (9.7°C), is the coldest month. Weather in December »
Updated: Aug 15, 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 Portola Hills, during the entire year, the rain falls for 65.4 days and collects up to 9.17" (233mm) of precipitation.
What are the months with the lowest UV index?
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 4.
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 most humid month?
May and June, with an average relative humidity of 69%, are most humid months in Portola Hills.
What is the driest month?
The month with the least rainfall in Portola Hills is June, when the rain falls for 2 days and typically collects 0.08" (2mm) of precipitation.
When are the longest days?
The month with the longest days is June, with an average of 14h and 24min of daylight.
What are the months with the highest UV index?
June through September, with an average maximum UV index of 6, are months with the highest UV index.
What is the month with the most sunshine?
July and August, with an average of 12h of sunshine, are months with the most sunshine.
What is the hottest time of year?
August is the month when Portola Hills, California, experiences its warmest temperatures, averaging a high of 82°F (27.8°C) and a low of 64.4°F (18°C).
What is the least humid month?
The least humid month is November, with an average relative humidity of 55%.
What is the coldest time of year?
December stands out as Portola Hills's coldest month, with an average high-temperature of 63.1°F (17.3°C) and a low-temperature of 49.5°F (9.7°C).
What is the rainiest month?
December is the month with the most rainfall. Rain falls for 6.7 days and accumulates 1.85" (47mm) of precipitation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 10h and 0min of daylight.
What is the month with the least sunshine in Portola Hills?
With an average of 6.6h of sunshine, December has the least sunshine of the year.
Average temperature
Portola Hills, CA
The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (63.1°F).
The month with the highest average low temperature is August (64.4°F).
The coldest month (with the lowest average low temperature) is February (48.7°F).
Average pressure
Portola Hills, 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:
29.92"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:
29.88"Hg - Average pressure in October:
29.94"Hg - Average pressure in November:
30.02"Hg - Average pressure in December:
30.07"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.88"Hg).
Average wind speed
Portola Hills, CA
- Average wind speed in January:
5mph - Average wind speed in February:
5.1mph - Average wind speed in March:
5.2mph - Average wind speed in April:
5.7mph - Average wind speed in May:
5.7mph - Average wind speed in June:
5mph
- Average wind speed in July:
4.8mph - Average wind speed in August:
4.5mph - 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 months (with the lowest average wind speed) are August and September (4.5mph).
Average humidity
Portola Hills, CA
The months with the highest relative humidity are May and June (69%).
The month with the lowest relative humidity is November (55%).
Average rainfall
Portola Hills, CA
- Average rainfall in January:
1.3" - Average rainfall in February:
1.42" - Average rainfall in March:
1.06" - Average rainfall in April:
0.59" - Average rainfall in May:
0.39" - Average rainfall in June:
0.08"
- Average rainfall in July:
0.47" - Average rainfall in August:
0.39" - Average rainfall in September:
0.31" - Average rainfall in October:
0.47" - Average rainfall in November:
0.83" - Average rainfall in December:
1.85"
The wettest month (with the highest rainfall) is December (1.85").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days
Portola Hills, CA
- Average rainfall days in January:
5.6 days - Average rainfall days in February:
6.4 days - Average rainfall days in March:
8.1 days - Average rainfall days in April:
7.2 days - Average rainfall days in May:
6.2 days - Average rainfall days in June:
2 days
- Average rainfall days in July:
5.3 days - Average rainfall days in August:
3.3 days - Average rainfall days in September:
4.6 days - Average rainfall days in October:
4.7 days - Average rainfall days in November:
5.3 days - Average rainfall days in December:
6.7 days
The month with the highest number of rainy days is March (8.1 days).
The month with the least rainy days is June (2 days).
Average daylight / Average sunshine
Portola Hills, 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 0min - 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:
10h and 0min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in January:
6h and 5min - Average sunshine in February:
6h and 4min - Average sunshine in March:
8h and 4min - Average sunshine in April:
10h and 5min - Average sunshine in May:
11h and 1min - Average sunshine in June:
11h and 5min
- Average sunshine in July:
12h and 0min - Average sunshine in August:
12h and 0min - Average sunshine in September:
10h and 4min - Average sunshine in October:
8h and 3min - Average sunshine in November:
7h and 1min - Average sunshine in December:
6h and 4min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days
Portola Hills, CA
- Average sunshine days in January:
24.2 days - Average sunshine days in February:
19.7 days - Average sunshine days in March:
21.1 days - Average sunshine days in April:
20.6 days - Average sunshine days in May:
19.3 days - Average sunshine days in June:
22.3 days
- Average sunshine days in July:
22.3 days - Average sunshine days in August:
23.8 days - Average sunshine days in September:
21.8 days - Average sunshine days in October:
24.2 days - Average sunshine days in November:
23.6 days - Average sunshine days in December:
22.5 days
The months with the most sunshine days are January and October (24.2 days).
The month with the least sunshine days is May (19.3 days).
Average UV index
Portola Hills, 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
Portola Hills, CA
The months with the most cloud cover are March and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility
Portola Hills, 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).
Portola Hills, 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