Climate and monthly weather forecastArroyo Grande, CA
Climate and monthly weather forecast
Weather in January
January, like December, in Arroyo Grande, California, is another refreshing winter month, with temperature in the range of an average high of 63°F (17.2°C) and an average low of 47.5°F (8.6°C). December's transformation into January witnesses an average high-temperature of a still enjoyable 63°F (17.2°C), noting a minor change from the preceding month. Weather in January »Weather in February
February, the last month of the winter in Arroyo Grande, is another refreshing month, with an average temperature varying between 62.2°F (16.8°C) and 46°F (7.8°C). The advent of February signifies a minor shift to an average high-temperature of a still refreshing 62.2°F (16.8°C), aligning closely with January. Weather in February »Weather in March
March, the first month of the spring in Arroyo Grande, is still a refreshing month, with temperature in the range of an average low of 46.9°F (8.3°C) and an average high of 64.9°F (18.3°C). As Arroyo Grande steps into March, the average high-temperature is measured at a still enjoyable 64.9°F (18.3°C), displaying minor differences from February's 62.2°F (16.8°C). Weather in March »Weather in April
April, like March, in Arroyo Grande, California, is another comfortable spring month, with an average temperature varying between 48.6°F (9.2°C) and 67.6°F (19.8°C). April's advent notes a subtle adjustment in average high-temperature to a still enjoyable 67.6°F (19.8°C) from March. Weather in April »Weather in May
The last month of the spring, May, is an agreeable month in Arroyo Grande, California, with an average temperature varying between 70.5°F (21.4°C) and 51.4°F (10.8°C). The transition into May reveals an average high-temperature of an agreeable 70.5°F (21.4°C), mirroring a close resemblance to April. Weather in May »Weather in June
June, the first month of the summer in Arroyo Grande, is a warm month, with temperature in the range of an average low of 55°F (12.8°C) and an average high of 75.4°F (24.1°C). The transition into June is marked with an average high-temperature of a moderately hot 75.4°F (24.1°C), showing an insignificant shift from May's 70.5°F (21.4°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in Arroyo Grande, California, with an average temperature fluctuating between 78.6°F (25.9°C) and 58.5°F (14.7°C). Arroyo Grande, California, observes a minor difference in average high-temperatures between June's 75.4°F (24.1°C) and July's 78.6°F (25.9°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Arroyo Grande, California, with an average temperature fluctuating between 59.2°F (15.1°C) and 78.8°F (26°C). The advent of August sees the average high-temperature at a still warm 78.8°F (26°C), subtly shifted from July's 78.6°F (25.9°C). Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Arroyo Grande, California, with an average temperature fluctuating between 59.9°F (15.5°C) and 79.5°F (26.4°C). September is the month that records the highest temperatures, with averages ranging from a high of 79.5°F (26.4°C) to a low of 59.9°F (15.5°C). Weather in September »Weather in October
October, like September, in Arroyo Grande, California, is another warm autumn month, with an average temperature ranging between max 74.3°F (23.5°C) and min 56.7°F (13.7°C). The arrival of October coincides with an average high-temperature of a still moderately hot 74.3°F (23.5°C), indicating a minimal shift from September's 79.5°F (26.4°C). Weather in October »Weather in November
November, the last month of the autumn in Arroyo Grande, is another comfortable month, with temperature in the range of an average high of 67.8°F (19.9°C) and an average low of 51.4°F (10.8°C). The beginning of November brings a slight decrease in the average high-temperature, transitioning from a moderately hot 74.3°F (23.5°C) in October to a comfortable 67.8°F (19.9°C). Weather in November »Weather in December
December, the first month of the winter in Arroyo Grande, is still a refreshing month, with an average temperature fluctuating between 46.8°F (8.2°C) and 61.2°F (16.2°C). Arroyo Grande, California, witnesses the coldest weather in December, with temperatures averaging a high of 61.2°F (16.2°C) and a low of 46.8°F (8.2°C). Weather in December »Updated: Feb 9, 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 Arroyo Grande, California, during the entire year, the rain falls for 47.6 days and collects up to 6.93" (176mm) of precipitation.
The months with the lowest UV index in Arroyo Grande are January through March, November and December, with an average maximum UV index of 4.
The months with the least sunshine are February and December, with an average of 6.5h of sunshine.
March is the most humid month, with an average relative humidity of 68%.
The month with the most rainfall is March, when the rain falls for 8.4 days and typically aggregates up to 1.61" (41mm) of precipitation.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Arroyo Grande, California, 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 months with the least rainfall in Arroyo Grande, California, are June and August Rain falls for 1 days and accumulates 0.04" (1mm) of rain.
The month with the longest days in Arroyo Grande, California, is June, with an average of 14h and 30min of daylight.
The months with the most sunshine in Arroyo Grande, California, are June through August, with an average of 12h of sunshine.
June and August, with an average maximum UV index of 6, are months with the highest UV index in Arroyo Grande.
Temperature readings in Arroyo Grande, California, reach their annual highs in September, averaging 79.5°F (26.4°C) and a minimum average of 59.9°F (15.5°C).
With an average relative humidity of 58%, October is the least humid month in Arroyo Grande, California.
In Arroyo Grande, California, the lowest temperatures are generally noted in December, averaging a high of 61.2°F (16.2°C) and a low of 46.8°F (8.2°C).
The month with the shortest days is December, with an average of 9h and 48min of daylight.
Average temperature
Arroyo Grande, CA
The warmest month (with the highest average high temperature) is September (79.5°F).
The month with the lowest average high temperature is December (61.2°F).
The month with the highest average low temperature is September (59.9°F).
The coldest month (with the lowest average low temperature) is February (46°F).
Average pressure
Arroyo Grande, CA
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.07"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
30.01"Hg - Average pressure in May:
29.97"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.91"Hg - Average pressure in September:
29.91"Hg - Average pressure in October:
29.97"Hg - Average pressure in November:
30.05"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.91"Hg).
Average wind speed
Arroyo Grande, CA
- Average wind speed in January:
6.2mph - Average wind speed in February:
6.8mph - Average wind speed in March:
6.8mph - Average wind speed in April:
7.3mph - Average wind speed in May:
7.3mph - Average wind speed in June:
6.6mph
- Average wind speed in July:
5.8mph - Average wind speed in August:
5.7mph - Average wind speed in September:
5.8mph - Average wind speed in October:
6.1mph - Average wind speed in November:
6mph - Average wind speed in December:
6.5mph
The windiest months (with the highest average wind speed) are April and May (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity
Arroyo Grande, CA
The month with the highest relative humidity is March (68%).
The month with the lowest relative humidity is October (58%).
Average rainfall
Arroyo Grande, CA
- Average rainfall in January:
1.22" - Average rainfall in February:
1.22" - Average rainfall in March:
1.61" - Average rainfall in April:
0.47" - Average rainfall in May:
0.16" - Average rainfall in June:
0.04"
- Average rainfall in July:
0.12" - Average rainfall in August:
0.04" - Average rainfall in September:
0.08" - Average rainfall in October:
0.35" - Average rainfall in November:
0.59" - Average rainfall in December:
1.02"
The wettest month (with the highest rainfall) is March (1.61").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days
Arroyo Grande, CA
- Average rainfall days in January:
5.5 days - Average rainfall days in February:
6.4 days - Average rainfall days in March:
8.4 days - Average rainfall days in April:
5.4 days - Average rainfall days in May:
3 days - Average rainfall days in June:
1 days
- Average rainfall days in July:
2.5 days - Average rainfall days in August:
0.8 days - Average rainfall days in September:
1.8 days - Average rainfall days in October:
2.9 days - Average rainfall days in November:
3.5 days - Average rainfall days in December:
6.4 days
The month with the highest number of rainy days is March (8.4 days).
The month with the least rainy days is August (0.8 days).
Average daylight / Average sunshine
Arroyo Grande, CA
- Average daylight in January:
10h and 6min - Average daylight in February:
10h and 54min - 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 30min
- 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 18min - Average daylight in December:
9h and 48min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in January:
6h and 48min - Average sunshine in February:
6h and 30min - Average sunshine in March:
8h and 36min - Average sunshine in April:
10h and 54min - Average sunshine in May:
11h and 24min - Average sunshine in June:
12h and 0min
- Average sunshine in July:
12h and 0min - Average sunshine in August:
12h and 0min - Average sunshine in September:
11h and 18min - Average sunshine in October:
7h and 36min - Average sunshine in November:
7h and 6min - Average sunshine in December:
6h and 30min
The months with the most sunshine are June, July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are February and December (Average sunshine: 6h and 30min).
Average sunshine days
Arroyo Grande, CA
- Average sunshine days in January:
24.3 days - Average sunshine days in February:
21 days - Average sunshine days in March:
22.2 days - Average sunshine days in April:
24.3 days - Average sunshine days in May:
27.2 days - Average sunshine days in June:
28.5 days
- Average sunshine days in July:
27.5 days - Average sunshine days in August:
29.6 days - Average sunshine days in September:
28.2 days - Average sunshine days in October:
27.4 days - Average sunshine days in November:
25.5 days - Average sunshine days in December:
24 days
The month with the most sunshine days is August (29.6 days).
The month with the least sunshine days is February (21 days).
Average UV index
Arroyo Grande, CA
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover
Arroyo Grande, CA
The month with the most cloud cover is March (Cloud cover 27).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility
Arroyo Grande, 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).
