, near the San Joaquin River.
, fog can form.
of the year, the temperature generally drops to 0/-3 °C (27/32 °F) at night, while during the day it reaches about 10 °C (50 °F). But in December 1990, it reached -8 °C (17.5 °F). Snow is very rare. On the days when there is no fog and no rain, the temperature can reach 18/19 °C (64/66 °F) even in the middle of winter.
of the year, the temperature can reach 42/43 °C (108/109 °F). In July 2021, the temperature reached 45.6 °C (114 °F). It can sometimes get very hot even in late April and early October.
to visit Fresno are spring and autumn, to avoid the night-time cold, the fog and the rain of winter, as well as the summer heat. In particular, you can choose the months of April and October, bearing in mind that it is necessary to dress in layers because there are strong differences in temperature between night and day.
. Here are the average temperatures.
January is generally a mild month. The average temperature is of
8.9 °C, with a minimum of
4.8 °C and a maximum of
13 °C.

On the coldest nights of the month, the temperature usually drops to around
-1 °C. However, it dropped to
-5 °C in January 2007.

On the warmest days of the month, the temperature usually reaches around
20 °C. However, it reached
25.6 °C in January 2014.

Precipitation amounts to
55 mm, distributed over 8 days.
The day lasts on average 10 hours and 0 minutes.

There are on average 4.5 hours of sunshine per day. So, the sun shines 46% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is of
6.6 kph.
February is generally a mild month. The average temperature is of
11.3 °C, with a minimum of
6.3 °C and a maximum of
16.3 °C.

On the coldest nights of the month, the temperature usually drops to around
1 °C. However, it dropped to
-1.7 °C in February 2002.

On the warmest days of the month, the temperature usually reaches around
23 °C. However, it reached
28.3 °C in February 2020.

Precipitation amounts to
50 mm, distributed over 8 days.
The day lasts on average 10 hours and 55 minutes.

There are on average 7 hours of sunshine per day. So, the sun shines 64% of the time.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is of
7.8 kph.
March is generally a mild month. The average temperature is of
14.1 °C, with a minimum of
8.5 °C and a maximum of
19.7 °C.

On the coldest nights of the month, the temperature usually drops to around
3 °C. However, it dropped to
0 °C in March 2011.

On the warmest days of the month, the temperature usually reaches around
27.5 °C. However, it reached
32.8 °C in March 2015.

Precipitation amounts to
50 mm, distributed over 7 days.
The day lasts on average 12 hours and 0 minutes.

There are on average 9 hours of sunshine per day. So, the sun shines 77% of the time.
The average humidity is 63%.
The average wind speed is of
9.4 kph.
April is generally a very mild month. The average temperature is of
16.8 °C, with a minimum of
10.5 °C and a maximum of
23.2 °C.

On the coldest nights of the month, the temperature usually drops to around
4.5 °C. However, it dropped to
0.6 °C in April 1999.

On the warmest days of the month, the temperature usually reaches around
32.5 °C. However, it reached
37 °C in April 2004.

Precipitation amounts to
25 mm, distributed over 4 days.
The day lasts on average 13 hours and 10 minutes.

There are on average 11 hours of sunshine per day. So, the sun shines 85% of the time.
The average humidity is 52%.
The average wind speed is of
11.8 kph.
May is generally a warm month. However, there are remarkable differences between night and day. The average temperature is of
21.2 °C, with a minimum of
14.2 °C and a maximum of
28.2 °C.

On the coldest nights of the month, the temperature usually drops to around
8.5 °C. However, it dropped to
6.1 °C in May 2010.

On the warmest days of the month, the temperature usually reaches around
37 °C. However, it reached
41.1 °C in May 2009.

Precipitation amounts to
10 mm, distributed over 3 days.
The day lasts on average 14 hours and 10 minutes. So the days are long.

There are on average 13 hours of sunshine per day. So, the sun shines 91% of the time.
The average humidity is 43%.
The average wind speed is of
13.4 kph.
June is generally a warm to hot month. However, there are remarkable differences between night and day. The average temperature is of
25.4 °C, with a minimum of
17.7 °C and a maximum of
33 °C.

On the coldest nights of the month, the temperature usually drops to around
11.5 °C. However, it dropped to
7.8 °C in June 1995.

On the warmest days of the month, the temperature usually reaches around
41 °C. However, it reached
43.3 °C in June 2008.

Precipitation amounts to only
5 mm, and all occurs in one day.
The day lasts on average 14 hours and 35 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.

There are on average 13.5 hours of sunshine per day. So, the sun shines 94% of the time.
The average humidity is 37%.
The average wind speed is of
13.6 kph.
July, the hottest month of the year, is generally a very hot month. However, there are remarkable differences between night and day. The average temperature is of
28.6 °C, with a minimum of
20.7 °C and a maximum of
36.5 °C.

On the coldest nights of the month, the temperature usually drops to around
15.5 °C. However, it dropped to
12.8 °C in July 2000.

On the warmest days of the month, the temperature usually reaches around
42 °C. However, it reached
45 °C in July 2006.

Precipitation amounts to only
0 mm, so on average it never rains in the whole month.
The day lasts on average 14 hours and 25 minutes. So the days are long.

There are on average 14 hours of sunshine per day. So, the sun shines 96% of the time.
The average humidity is 35%.
The average wind speed is of
12.3 kph.
August is generally a very hot month. However, there are remarkable differences between night and day. The average temperature is of
27.9 °C, with a minimum of
19.9 °C and a maximum of
35.8 °C.

On the coldest nights of the month, the temperature usually drops to around
15.5 °C. However, it dropped to
13.3 °C in August 1992.

On the warmest days of the month, the temperature usually reaches around
41.5 °C. However, it reached
44.4 °C in August 2020.

Precipitation amounts to only
0 mm, so on average it never rains in the whole month.
The day lasts on average 13 hours and 30 minutes.

There are on average 13 hours of sunshine per day. So, the sun shines 95% of the time.
The average humidity is 36%.
The average wind speed is of
11.3 kph.
September is generally a warm to hot month. However, there are remarkable differences between night and day. The average temperature is of
25 °C, with a minimum of
17.4 °C and a maximum of
32.6 °C.

On the coldest nights of the month, the temperature usually drops to around
12 °C. However, it dropped to
9 °C in September 2004.

On the warmest days of the month, the temperature usually reaches around
39.5 °C. However, it reached
42.8 °C in September 2017.

Precipitation amounts to only
0 mm, so on average it never rains in the whole month.
The day lasts on average 12 hours and 25 minutes.

There are on average 11.5 hours of sunshine per day. So, the sun shines 93% of the time.
The average humidity is 40%.
The average wind speed is of
9.6 kph.
October is generally a warm month. However, there are remarkable differences between night and day. The average temperature is of
19.2 °C, with a minimum of
12.6 °C and a maximum of
25.9 °C.

On the coldest nights of the month, the temperature usually drops to around
7 °C. However, it dropped to
4 °C in October 1996.

On the warmest days of the month, the temperature usually reaches around
34.5 °C. However, it reached
39 °C in October 2010.

Precipitation amounts to
15 mm, distributed over 2 days.
The day lasts on average 11 hours and 10 minutes.

There are on average 10 hours of sunshine per day. So, the sun shines 87% of the time.
The average humidity is 50%.
The average wind speed is of
7.6 kph.
November is generally a mild month. The average temperature is of
12.9 °C, with a minimum of
7.4 °C and a maximum of
18.3 °C.

On the coldest nights of the month, the temperature usually drops to around
1.5 °C. However, it dropped to
-1.7 °C in November 1993.

On the warmest days of the month, the temperature usually reaches around
26.5 °C. However, it reached
32.2 °C in November 2010.

Precipitation amounts to
20 mm, distributed over 5 days.
The day lasts on average 10 hours and 10 minutes.

There are on average 6.5 hours of sunshine per day. So, the sun shines 62% of the time.
The average humidity is 68%.
The average wind speed is of
6.2 kph.
December, the coldest month of the year, is generally a mild month. The average temperature is of
8.6 °C, with a minimum of
4.3 °C and a maximum of
12.9 °C.

On the coldest nights of the month, the temperature usually drops to around
-1 °C. However, it dropped to
-6 °C in December 1998.

On the warmest days of the month, the temperature usually reaches around
20 °C. However, it reached
25 °C in December 2006.

Precipitation amounts to
45 mm, distributed over 7 days.
The day lasts on average 9 hours and 40 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.

There are on average 4 hours of sunshine per day. So, the sun shines 42% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is of
6.5 kph.