Monthly weather forecast and climate
Rochester, CA

Weather in January

January, like December, in Rochester, California, is another comfortable winter month, with average temperature ranging between min 46.2°F (7.9°C) and max 64°F (17.8°C). In January, the average high-temperature is practically the same as in December - a still enjoyable 64°F (17.8°C). Weather in January »

Weather in February

February, the last month of the winter, in Rochester, is also an enjoyable month, with temperature in the range of an average high of 64°F (17.8°C) and an average low of 45.3°F (7.4°C). In February, the average high-temperature remains the same as in January - a still comfortable 64°F (17.8°C). Weather in February »

Weather in March

March, the first month of the spring, in Rochester, is an agreeable month, with average temperature fluctuating between 68.4°F (20.2°C) and 46.9°F (8.3°C). In Rochester, California, the average high-temperature in March is practically the same as in February - a pleasant 68.4°F (20.2°C). Weather in March »

Weather in April

April, like March, is an agreeable spring month in Rochester, California, with average temperature ranging between min 50.5°F (10.3°C) and max 72.9°F (22.7°C). In April, the average high-temperature is almost the same as in March - a still pleasant 72.9°F (22.7°C). Weather in April »

Weather in May

The last month of the spring, May, is a moderately hot month in Rochester, California, with average temperature fluctuating between 53.6°F (12°C) and 76.6°F (24.8°C). In Rochester, the average high-temperature in May is almost the same as in April - a moderately hot 76.6°F (24.8°C). Weather in May »

Weather in June

The first month of the summer, June, is still a warm month in Rochester, California, with average temperature ranging between min 58.6°F (14.8°C) and max 84.7°F (29.3°C). In June, the average high-temperature slightly increases, from a moderately hot 76.6°F (24.8°C) in May, to a still warm 84.7°F (29.3°C). Weather in June »

Weather in July

July in Rochester, California, is a hot summer month, with temperature in the range of an average high of 90.5°F (32.5°C) and an average low of 64.8°F (18.2°C). In Rochester, California, the average high-temperature marginally rises, from a moderately hot 84.7°F (29.3°C) in June, to a tropical 90.5°F (32.5°C). Weather in July »

Weather in August

The last month of the summer, August, is also a hot month in Rochester, California, with average temperature fluctuating between 66.6°F (19.2°C) and 91.8°F (33.2°C). The warmest month is August, with an average high-temperature of 91.8°F (33.2°C) and an average low-temperature of 66.6°F (19.2°C). In August, the average heat index is appraised at a tropical 93.7°F (34.3°C). Weather in August »

Weather in September

September, the first month of the autumn, in Rochester, is also a hot month, with average temperature varying between 63.7°F (17.6°C) and 88.3°F (31.3°C). In Rochester, the average high-temperature in September is essentially the same as in August - a still hot 88.3°F (31.3°C). Weather in September »

Weather in October

October, the same as September, is a moderately hot autumn month in Rochester, California, with temperature in the range of an average low of 57.6°F (14.2°C) and an average high of 79.2°F (26.2°C). In Rochester, California, the average high-temperature in October drops, from a hot 88.3°F (31.3°C) in September, to a moderately hot 79.2°F (26.2°C). Weather in October »

Weather in November

The last month of the autumn, November, is also an agreeable month in Rochester, California, with average temperature ranging between min 50.9°F (10.5°C) and max 70.7°F (21.5°C). In November, the average high-temperature slightly decreases, from a warm 79.2°F (26.2°C) in October, to an agreeable 70.7°F (21.5°C). Weather in November »

Weather in December

December, the first month of the winter, in Rochester, is still a comfortable month, with average temperature fluctuating between 45.3°F (7.4°C) and 61.7°F (16.5°C). The coldest month is December, with an average high-temperature of 61.7°F (16.5°C) and an average low-temperature of 45.3°F (7.4°C). Weather in December »
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FAQ

How many days does it rain in Rochester?

In Rochester, during the entire year, the rain falls for 42.3 days and collects up to 4.53" (115mm) of precipitation.

How many days does it snow in Rochester?

Throughout the year, in Rochester, there are 0.1 snowfall days.

When it does not snow in Rochester?

January, March through December are months without snowfall in Rochester, California.

What is the most humid month in Rochester?

Months with the highest humidity in Rochester, California, are February, March and May, with an average relative humidity of 53%.

What is the rainiest month in Rochester?

February is the month with the most rainfall in Rochester, California. Rain falls for 4.5 days and accumulates 0.98" (25mm) of precipitation.

When does it snow in Rochester?

February is the only month when snow falls in Rochester.

When does it snow the most in Rochester?

The month with the most snowfall days in Rochester is February when snow falls for 0.1 days.

What is the month with the least sunshine in Rochester?

Months with the least sunshine in Rochester, California, are February and December, with an average of 6.9h of sunshine.

What is the driest month in Rochester?

June is the month with the least rainfall in Rochester, California. Rain falls for 0.9 days and accumulates 0.04" (1mm) of precipitation.

When are the longest days in Rochester?

With an average of 14.4h of daylight, June has the longest days of the year in Rochester, California.

What month has the most sunshine in Rochester?

July has the most sunshine of the year, with an average of 12.1h of sunshine.

What are the months with the highest UV index in Rochester?

July and August, with an average maximum UV index of 7, are months with the highest UV index in Rochester, California.

What is the warmest month in Rochester?

With an average high-temperature of 91.8°F (33.2°C) and an average low-temperature of 66.6°F (19.2°C), August is the warmest month in Rochester.

What is the least humid month in Rochester?

The least humid month in Rochester is August, with an average relative humidity of 41%.

What is the coldest month in Rochester?

December is the coldest month in Rochester, with an average high-temperature of 61.7°F (16.5°C) and an average low-temperature of 45.3°F (7.4°C).

What is the month with the shortest days in Rochester?

The month with the shortest days is December, with an average of 9.9h of daylight.

What is the month with the lowest UV index in Rochester?

December is the month with the lowest UV index, with an average maximum UV index of 3.

Average temperature
Rochester, CA

Average temperature - Rochester, CA

The warmest month (with the highest average high temperature) is August (91.8°F).
The month with the lowest average high temperature is December (61.7°F).

The month with the highest average low temperature is August (66.6°F).
The coldest months (with the lowest average low temperature) are February and December (45.3°F).

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Average pressure
Rochester, CA

Average pressure - Rochester, CA

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is June (29.86").

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Average wind speed
Rochester, CA

Average wind speed - Rochester, CA

The windiest month (with the highest average wind speed) is May (5.9mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).

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Average humidity
Rochester, CA

Average humidity - Rochester, CA

Months with the highest relative humidity are February, March and May (53%).
The month with the lowest relative humidity is August (41%).

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Average rainfall
Rochester, CA

Average rainfall - Rochester, CA

The wettest month (with the highest rainfall) is February (0.98").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days
Rochester, CA

Average rainfall days - Rochester, CA

The month with the highest number of rainy days is March (6.3 days).
The month with the least rainy days is June (0.9 days).

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Average snowfall days
Rochester, CA

Average snowfall days - Rochester, CA

The month with the highest number of snowfall days is February (0.1 days).
Months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

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Average daylight / Average sunshine
Rochester, CA

Average daylight / Average sunshine - Rochester, CA

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

The month with the most sunshine is July (Average sunshine: 12.1h).
Months with the least sunshine are February and December (Average sunshine: 6.9).

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Average sunshine days
Rochester, CA

Average sunshine days - Rochester, CA

The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (22.8 days).

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Average visibility
Rochester, CA

Average visibility - Rochester, CA

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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