July weather forecastRochester, CA

July

Weather in July

July is a hot summer month in Rochester, California, with temperature in the range of an average low of 64.8°F (18.2°C) and an average high of 90.5°F (32.5°C).

Temperature

July's arrival signals a modest temperature shift, moving from a warm 84.7°F (29.3°C) in June to a hot 90.5°F (32.5°C). Rochester in July observes a substantial swing from the daily highs, with average nighttime temperatures of 64.8°F (18.2°C).

Heat index

In July, the heat index is estimated at a hot 93.2°F (34°C). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.
Be advised, the heat index considers values for conditions in shade and with a light breeze. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', determines the feeling of heat when you account for the relative humidity. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.

Humidity

In Rochester, the average relative humidity in July is 44%.

Rainfall

In Rochester, during July, the rain falls for 2.8 days and regularly aggregates up to 0.16" (4mm) of precipitation. Throughout the year, there are 42.3 rainfall days, and 4.53" (115mm) of precipitation is accumulated.

Snowfall

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

Daylight

In July, the average length of the day in Rochester is 14h and 10min.
On the first day of July in Rochester, California, sunrise is at 5:42 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 6:01 am and sunset at 7:51 pm PDT.

Sunshine

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

UV index

July and August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for average individuals.
Note: In July, the maximum UV index of 7 translates into these guidelines:
Ward off overexposure. Defence against solar harm is crucial. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.

Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

An average high-temperature, in July, in Rochester, is 90.5°F (32.5°C) and the average low-temperature is 64.8°F (18.2°C). In July, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, is estimated at 93.2°F (34°C).

In Rochester, the average relative humidity in July is 44%.

In Rochester, California, in July, during 2.8 rainfall days, 0.16" (4mm) of precipitation is typically accumulated.

In Rochester, snow does not fall in January, March through December.

In July, the average day length in Rochester, California, is 14h and 10min.

In July, on the first day of the month, sunrise is at 5:42 am and sunset at 8:05 pm. On the last day of the month, in Rochester, California, sunrise is at 6:01 am and sunset at 7:51 pm PDT.

The month with the most sunshine in Rochester is July, with an average of 12.1h of sunshine.

In July, the average sunshine duration in Rochester, California, is 12.1h.

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

The average daily maximum UV index in July in Rochester, California, is 7. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J July A S O N D

Jun

July

Aug

Average high temperature

84.7°F

90.5°F

91.8°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

6.3mph

5.9mph

5.7mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

0.9

2.8

1.9

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

28.3

25.3

26.8

Average UV index

Average cloud cover

Average visibility

6mi

Average temperature in July
Rochester, CA

Average high temperature in July: 90.5°F

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).

Average low temperature in July: 64.8°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).

Average pressure in July
Rochester, CA

Average pressure in July: 29.89"Hg

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

Average wind speed in July
Rochester, CA

Average wind speed in July: 5.1mph

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).

Average humidity in July
Rochester, CA

Average humidity in July: 44%

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

Average rainfall in July
Rochester, CA

Average rainfall in July: 0.16"

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

Average rainfall days in July
Rochester, CA

Average rainfall days in July: 2.8 days

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).

Average snowfall days in July
Rochester, CA

Average snowfall days in July: 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 in July /
Average sunshine in July
Rochester, CA

Average daylight in July: 14h and 12min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

Average sunshine in July: 12h and 6min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 54min).

Average sunshine days in July
Rochester, CA

Average sunshine days in July: 25.3 days

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

Average UV index in July
Rochester, CA

Average UV index in July: 7

The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

Average cloud cover in July
Rochester, CA

Average cloud cover in July: 6

The months with the most cloud cover are February and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).

Average visibility in July
Rochester, CA

Average visibility in July: 6mi

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).