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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 San Ysidro, California, is another comfortable winter month, with an average temperature fluctuating between 50.9°F (10.5°C) and 65.5°F (18.6°C). Transitioning from December to January, San Ysidro observes an average high-temperature of a still enjoyable 65.5°F (18.6°C), differing subtly from the previous month. Weather in January »
Weather in February
The last month of the winter, February, is another comfortable month in San Ysidro, California, with an average temperature ranging between max 64.4°F (18°C) and min 50.2°F (10.1°C). As February unfolds, the average high-temperature reaches a still refreshing 64.4°F (18°C), hinting at a slight fluctuation from the previous month. Weather in February »
Weather in March
March, the first month of the spring in San Ysidro, is also an enjoyable month, with an average temperature fluctuating between 51.3°F (10.7°C) and 66.6°F (19.2°C). The shift from February to March is characterized by an average high-temperature of a still enjoyable 66.6°F (19.2°C), not significantly different from the 64.4°F (18°C) of February. Weather in March »
Weather in April
April in San Ysidro, California, is a pleasant spring month, with an average temperature ranging between max 68.5°F (20.3°C) and min 53.1°F (11.7°C). The beginning of April reveals an average high-temperature of an agreeable 68.5°F (20.3°C), showing minimal deviation from the previous month. Weather in April »
Weather in May
The last month of the spring, May, is also an agreeable month in San Ysidro, California, with an average temperature ranging between min 55.9°F (13.3°C) and max 69.8°F (21°C). May's arrival shows an average high-temperature of a still agreeable 69.8°F (21°C), hardly different from the previous month. Weather in May »
Weather in June
June, the first month of the summer in San Ysidro, is a moderately hot month, with temperature in the range of an average high of 74.1°F (23.4°C) and an average low of 59.2°F (15.1°C). June's arrival brings an average high-temperature of a warm 74.1°F (23.4°C), slightly deviating from May's 69.8°F (21°C). Weather in June »
Weather in July
July, like June, in San Ysidro, California, is a moderately hot summer month, with an average temperature ranging between max 79°F (26.1°C) and min 64.9°F (18.3°C). The arrival of July marks a slight shift to an average high-temperature of a still moderately hot 79°F (26.1°C) from June's 74.1°F (23.4°C). Weather in July »
Weather in August
August, the last month of the summer in San Ysidro, is another warm month, with an average temperature ranging between min 66.7°F (19.3°C) and max 81.1°F (27.3°C). San Ysidro's warmest month, August, generally records average temperatures ranging from a high of 81.1°F (27.3°C) to a low of 66.7°F (19.3°C). The heat index value during August is estimated 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 San Ysidro, California, with an average temperature varying between 80.1°F (26.7°C) and 65.5°F (18.6°C). As August transitions into September, the average high-temperature rests at a still moderately hot 80.1°F (26.7°C), maintaining a close resemblance to the previous month. Weather in September »
Weather in October
October, the same as September, is another warm autumn month in San Ysidro, California, with temperature in the range of an average high of 75.6°F (24.2°C) and an average low of 61.2°F (16.2°C). The unfolding of October shows an average high-temperature of a still moderately hot 75.6°F (24.2°C), indicating a slight variance from September's 80.1°F (26.7°C). Weather in October »
Weather in November
The last month of the autumn, November, is another pleasant month in San Ysidro, California, with an average temperature fluctuating between 56.1°F (13.4°C) and 70.3°F (21.3°C). November registers an average high-temperature of a pleasant 70.3°F (21.3°C), slightly varied from October's 75.6°F (24.2°C). Weather in November »
Weather in December
The first month of the winter, December, is still a refreshing month in San Ysidro, California, with temperature in the range of an average high of 64°F (17.8°C) and an average low of 50.4°F (10.2°C). With average high temperatures of 64°F (17.8°C) and lows of 50.4°F (10.2°C), December is the coldest month. Weather in December »
[Resources]Frequently asked questions
How many days does it rain in San Ysidro?
Throughout the year, there are 57.8 rainfall days, and 7.28" (185mm) of precipitation is accumulated.
What are the months with the lowest UV index in San Ysidro?
The months with the lowest UV index in San Ysidro are January, February, November and December, with an average maximum UV index of 4.
What is the rainiest month in San Ysidro?
February is the month with the most rainfall. Rain falls for 6.3 days and accumulates 1.5" (38mm) of precipitation.
When is Daylight Saving Time (DST) in San Ysidro?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in San Ysidro, 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 San Ysidro?
May is the most humid month, with an average relative humidity of 68%.
What is the driest month in San Ysidro?
June is the month with the least rainfall. Rain falls for 1.8 days and accumulates 0.08" (2mm) of precipitation.
When are the longest days in San Ysidro?
The month with the longest days is June, with an average of 14h and 18min of daylight.
What are the months with the highest UV index in San Ysidro?
The months with the highest UV index in San Ysidro are June through September, with an average maximum UV index of 6.
What month has the most sunshine in San Ysidro?
The month with the most sunshine in San Ysidro is July, with an average of 12h of sunshine.
What time of the year is the hottest in San Ysidro?
San Ysidro's temperatures peak on average in August, reaching 81.1°F (27.3°C) at their highest and 66.7°F (19.3°C) at their lowest.
What is the least humid month in San Ysidro?
The least humid month in San Ysidro is November, with an average relative humidity of 55%.
What are the coldest months in San Ysidro?
San Ysidro's coldest month, December, registers temperatures that range from a high of 64°F (17.8°C) to a low of 50.4°F (10.2°C).
What is the month with the shortest days in San Ysidro?
With an average of 10h and 6min of daylight, December has the shortest days of the year in San Ysidro.
What is the month with the least sunshine in San Ysidro?
December has the least sunshine of the year in San Ysidro, California, with an average of 6.6h of sunshine.
Average temperature
San Ysidro, CA
The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (64°F).
The month with the highest average low temperature is August (66.7°F).
The coldest month (with the lowest average low temperature) is February (50.2°F).
Average pressure
San Ysidro, CA
- Average pressure in January:
30.08"Hg - Average pressure in February:
30.04"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:
29.88"Hg - Average pressure in September:
29.88"Hg - Average pressure in October:
29.93"Hg - Average pressure in November:
30.01"Hg - Average pressure in December:
30.06"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.88"Hg).
Average wind speed
San Ysidro, CA
- Average wind speed in January:
5.2mph - Average wind speed in February:
5.7mph - Average wind speed in March:
5.6mph - Average wind speed in April:
6mph - Average wind speed in May:
6mph - Average wind speed in June:
5.3mph
- Average wind speed in July:
5.2mph - Average wind speed in August:
5.1mph - Average wind speed in September:
5mph - Average wind speed in October:
4.8mph - Average wind speed in November:
5.1mph - Average wind speed in December:
5.2mph
The windiest months (with the highest average wind speed) are April and May (6mph).
The calmest month (with the lowest average wind speed) is October (4.8mph).
Average humidity
San Ysidro, CA
The month with the highest relative humidity is May (68%).
The month with the lowest relative humidity is November (55%).
Average rainfall
San Ysidro, CA
- Average rainfall in January:
0.79" - Average rainfall in February:
1.5" - Average rainfall in March:
0.79" - Average rainfall in April:
0.43" - Average rainfall in May:
0.39" - Average rainfall in June:
0.08"
- Average rainfall in July:
0.35" - Average rainfall in August:
0.35" - Average rainfall in September:
0.35" - Average rainfall in October:
0.16" - Average rainfall in November:
0.83" - Average rainfall in December:
1.26"
The wettest month (with the highest rainfall) is February (1.5").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days
San Ysidro, CA
- Average rainfall days in January:
5.1 days - Average rainfall days in February:
6.3 days - Average rainfall days in March:
7.5 days - Average rainfall days in April:
6.3 days - Average rainfall days in May:
5.4 days - Average rainfall days in June:
1.8 days
- Average rainfall days in July:
4.6 days - Average rainfall days in August:
3.2 days - Average rainfall days in September:
4.5 days - Average rainfall days in October:
2.8 days - Average rainfall days in November:
4.3 days - Average rainfall days in December:
6 days
The month with the highest number of rainy days is March (7.5 days).
The month with the least rainy days is June (1.8 days).
Average daylight / Average sunshine
San Ysidro, CA
- Average daylight in January:
10h and 2min - 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 0min - 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 3min - Average daylight in December:
10h and 1min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- 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 4min - Average sunshine in May:
10h and 4min - Average sunshine in June:
11h and 5min
- Average sunshine in July:
12h and 0min - Average sunshine in August:
11h and 5min - Average sunshine in September:
10h and 1min - Average sunshine in October:
8h and 5min - Average sunshine in November:
7h and 1min - Average sunshine in December:
6h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days
San Ysidro, CA
- Average sunshine days in January:
24.9 days - Average sunshine days in February:
20.8 days - Average sunshine days in March:
22.7 days - Average sunshine days in April:
23.3 days - Average sunshine days in May:
23.8 days - Average sunshine days in June:
27.8 days
- Average sunshine days in July:
23.7 days - Average sunshine days in August:
24 days - Average sunshine days in September:
24.3 days - Average sunshine days in October:
26.2 days - Average sunshine days in November:
24.6 days - Average sunshine days in December:
23.5 days
The month with the most sunshine days is June (27.8 days).
The month with the least sunshine days is February (20.8 days).
Average UV index
San Ysidro, 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, November and December (UV index 4).
Average cloud cover
San Ysidro, CA
The months with the most cloud cover are March and December (Cloud cover 25).
The month with the least cloud cover is August (Cloud cover 8).
Average visibility
San Ysidro, 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).
San Ysidro, California, USA
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