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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, the same as December, is another fresh winter month in Island Mountain, California, with an average temperature fluctuating between 54.3°F (12.4°C) and 44.8°F (7.1°C). The commencement of January notes an average high-temperature of a still fresh 54.3°F (12.4°C), exhibiting little difference from the previous month. Weather in January »
Weather in February
February, the last month of the winter in Island Mountain, is also a fresh month, with an average temperature varying between 43.5°F (6.4°C) and 54.1°F (12.3°C). Island Mountain's weather, upon February's arrival, documents an average high-temperature of a still cool 54.1°F (12.3°C), nearly identical to the prior month. Weather in February »
Weather in March
March, the first month of the spring in Island Mountain, is still a cool month, with an average temperature ranging between min 44.2°F (6.8°C) and max 54.9°F (12.7°C). With March's advent, Island Mountain sees an average high-temperature of a still fresh 54.9°F (12.7°C), subtly shifted from February's 54.1°F (12.3°C). Weather in March »
Weather in April
April is a mild spring month in Island Mountain, California, with temperature in the range of an average low of 45.7°F (7.6°C) and an average high of 57.2°F (14°C). Transitioning into April, Island Mountain experiences an average high-temperature of a mild 57.2°F (14°C), marking a minor shift from the preceding month. Weather in April »
Weather in May
May, the last month of the spring in Island Mountain, is a comfortable month, with an average temperature fluctuating between 48.4°F (9.1°C) and 61°F (16.1°C). May brings an average high-temperature of a still refreshing 61°F (16.1°C), nearly identical to the preceding month. Weather in May »
Weather in June
June, the first month of the summer in Island Mountain, is still a refreshing month, with an average temperature fluctuating between 66.6°F (19.2°C) and 51.8°F (11°C). Island Mountain's transition into June sees a mild rise in the average high-temperature, edging from a refreshing 61°F (16.1°C) in May to a still comfortable 66.6°F (19.2°C). Weather in June »
Weather in July
July is a pleasant summer month in Island Mountain, California, with an average temperature ranging between max 69.4°F (20.8°C) and min 54.3°F (12.4°C). July registers an average high-temperature of a pleasant 69.4°F (20.8°C), slightly varied from June's 66.6°F (19.2°C). Weather in July »
Weather in August
August, the last month of the summer in Island Mountain, is another pleasant month, with an average temperature varying between 54.3°F (12.4°C) and 69.4°F (20.8°C). Island Mountain marks the start of August with an average high temperature of a still pleasant 69.4°F (20.8°C), mirroring the readings from July. Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Island Mountain, California, with an average temperature ranging between min 54.3°F (12.4°C) and max 69.8°F (21°C). Island Mountain's warmest month, September, registers temperatures that range from a high of 69.8°F (21°C) to a low of 54.3°F (12.4°C). Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Island Mountain, California, with an average temperature fluctuating between 63.9°F (17.7°C) and 51.3°F (10.7°C). October heralds a minor drop in average high-temperature, sliding from September's pleasant 69.8°F (21°C) to a comfortable 63.9°F (17.7°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a moderate month in Island Mountain, California, with an average temperature fluctuating between 47.1°F (8.4°C) and 57.6°F (14.2°C). A minor decrease in the average high-temperature is observed during November, shifting from a comfortable 63.9°F (17.7°C) in October to a moderate 57.6°F (14.2°C). Weather in November »
Weather in December
The first month of the winter, December, is also a fresh month in Island Mountain, California, with temperature in the range of an average high of 53.4°F (11.9°C) and an average low of 43.9°F (6.6°C). In Island Mountain, the month of December is known for its lowest average temperatures, reaching a high of 53.4°F (11.9°C) and a low of 43.9°F (6.6°C). Weather in December »
Updated: Aug 28, 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 Island Mountain, during the entire year, the rain falls for 102.7 days and collects up to 28.78" (731mm) of precipitation.
When it does not snow?
In Island Mountain, snow does not fall in January, March through December.
How many days does it snow?
Throughout the year, there are 0.1 snowfall days.
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 3.
When does it snow?
The only month with snowfall in Island Mountain is February.
What is the snowiest month?
The month with the most snowfall days is February, when snow falls for 0.1 days.
What is the most humid month?
March is the most humid month, with an average relative humidity of 81%.
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.
When are the longest days?
With an average of 15h and 0min of daylight, June has the longest days of the year.
What are the months with the highest UV index?
The months with the highest UV index are June through August, with an average maximum UV index of 5.
What is the driest month?
July is the month with the least rainfall. Rain falls for 2.4 days and accumulates 0.08" (2mm) of precipitation.
What is the month with the most sunshine in Island Mountain?
July and August, with an average of 11.7h of sunshine, are months with the most sunshine.
What month is the hottest?
September, with its high-temperature average of 69.8°F (21°C) and a low-temperature average of 54.3°F (12.4°C), is the warmest month.
What is the least humid month?
The least humid month is September, with an average relative humidity of 72%.
What is the coldest month?
Island Mountain records the coldest temperatures in December, averaging a high of 53.4°F (11.9°C) and a low of 43.9°F (6.6°C).
What is the rainiest month?
The month with the most rainfall in Island Mountain is December, when the rain falls for 14.8 days and typically aggregates up to 5.31" (135mm) of precipitation.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 24min of daylight.
What is the month with the least sunshine?
The month with the least sunshine is December, with an average of 5h of sunshine.
Average temperature
Island Mountain, CA
The warmest month (with the highest average high temperature) is September (69.8°F).
The month with the lowest average high temperature is December (53.4°F).
The months with the highest average low temperature are July, August and September (54.3°F).
The coldest month (with the lowest average low temperature) is February (43.5°F).
Average pressure
Island Mountain, CA
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
30.06"Hg - Average pressure in May:
30"Hg - Average pressure in June:
29.96"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.95"Hg - Average pressure in September:
29.95"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are August and September (29.95"Hg).
Average wind speed
Island Mountain, CA
- Average wind speed in January:
7.8mph - Average wind speed in February:
9.3mph - Average wind speed in March:
9.3mph - Average wind speed in April:
9.4mph - Average wind speed in May:
9.5mph - Average wind speed in June:
10.6mph
- Average wind speed in July:
8.9mph - Average wind speed in August:
7.8mph - Average wind speed in September:
8.1mph - Average wind speed in October:
8.2mph - Average wind speed in November:
8mph - Average wind speed in December:
8.6mph
The windiest month (with the highest average wind speed) is June (10.6mph).
The calmest months (with the lowest average wind speed) are January and August (7.8mph).
Average humidity
Island Mountain, CA
The month with the highest relative humidity is March (81%).
The month with the lowest relative humidity is September (72%).
Average rainfall
Island Mountain, CA
- Average rainfall in January:
4.8" - Average rainfall in February:
4.02" - Average rainfall in March:
4.61" - Average rainfall in April:
2.05" - Average rainfall in May:
1.73" - Average rainfall in June:
0.43"
- Average rainfall in July:
0.08" - Average rainfall in August:
0.12" - Average rainfall in September:
0.47" - Average rainfall in October:
1.97" - Average rainfall in November:
3.19" - Average rainfall in December:
5.31"
The wettest month (with the highest rainfall) is December (5.31").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days
Island Mountain, CA
- Average rainfall days in January:
13 days - Average rainfall days in February:
12.2 days - Average rainfall days in March:
16.4 days - Average rainfall days in April:
10.9 days - Average rainfall days in May:
6.6 days - Average rainfall days in June:
3.7 days
- Average rainfall days in July:
2.4 days - Average rainfall days in August:
1.8 days - Average rainfall days in September:
3.5 days - Average rainfall days in October:
6.7 days - Average rainfall days in November:
10.7 days - Average rainfall days in December:
14.8 days
The month with the highest number of rainy days is March (16.4 days).
The month with the least rainy days is August (1.8 days).
Average snowfall days
Island Mountain, 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
Island Mountain, CA
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 2min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
5h and 1min - Average sunshine in February:
5h and 4min - Average sunshine in March:
6h and 4min - Average sunshine in April:
9h and 1min - Average sunshine in May:
10h and 1min - Average sunshine in June:
11h and 1min
- Average sunshine in July:
11h and 4min - Average sunshine in August:
11h and 4min - Average sunshine in September:
10h and 2min - Average sunshine in October:
6h and 4min - Average sunshine in November:
6h and 0min - Average sunshine in December:
5h and 0min
The months with the most sunshine are July and August (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days
Island Mountain, CA
- Average sunshine days in January:
16.9 days - Average sunshine days in February:
14.9 days - Average sunshine days in March:
13.1 days - Average sunshine days in April:
17.7 days - Average sunshine days in May:
22.8 days - Average sunshine days in June:
25.3 days
- Average sunshine days in July:
28.4 days - Average sunshine days in August:
28.2 days - Average sunshine days in September:
25.9 days - Average sunshine days in October:
23.3 days - Average sunshine days in November:
18.2 days - Average sunshine days in December:
15.5 days
The month with the most sunshine days is July (28.4 days).
The month with the least sunshine days is March (13.1 days).
Average UV index
Island Mountain, CA
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 3).
Average cloud cover
Island Mountain, CA
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 10).
Average visibility
Island Mountain, 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).
Island Mountain, California, USA
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