, given that the winters are mild and rainy, and the summers are hot and sunny. However, there are some differences in comparison with the typical Mediterranean climate: in winter, fog can form at night and in the early morning; in summer, there are strong diurnal temperature variations, so it is quite cool at night and hot during the day; the rainy period is shorter, so in autumn, in September and October, it still rains rarely.
, in the northern part of San Joaquin valley. Here, the difference in temperature between night and day and between winter and summer are much larger than in San Francisco, which is located 125 km (75 mi) to the north-west.
of the year, the temperature generally drops to -1/-3 °C (27/30 °F) at night, while it reaches about 10 °C (50 °F) during the day. But in December 1990, it reached -7 °C (19.5 °F). Snow is extremely rare: in practice, it never snows. 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 40/42 °C (104/108 °F). In August 2017, it reached 43 °C (109.5 °F), and in July 2006, even 45 °C (113 °F). It can sometimes be very hot even in late April and early October. However, since the daytime temperature range is very strong, generally, at night it gets quite cool even in the height of summer.
to visit Modesto 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 temperature differences between night and day.
. Here are the average temperatures.
January is generally a mild month. The average temperature is of
8.6 °C, with a minimum of
3.8 °C and a maximum of
13.4 °C.
On the coldest nights of the month, the temperature usually drops to around
-1.5 °C. However, it dropped to
-5 °C in January 2007.
On the warmest days of the month, the temperature usually reaches around
19 °C. However, it reached
22.8 °C in January 2014.
Precipitation amounts to
65 mm, distributed over 10 days.
The day lasts on average 9 hours and 55 minutes.
The average humidity is 80%. Hence, the air is normally humid.
The average wind speed is of
7.6 kph.
February is generally a mild month. The average temperature is of
11.1 °C, with a minimum of
5.4 °C and a maximum of
16.8 °C.
On the coldest nights of the month, the temperature usually drops to around
0.5 °C. However, it dropped to
-2.8 °C in February 2018.
On the warmest days of the month, the temperature usually reaches around
22 °C. However, it reached
26.7 °C in February 2020.
Precipitation amounts to
55 mm, distributed over 9 days.
The day lasts on average 10 hours and 50 minutes.
The average humidity is 70%.
The average wind speed is of
9.1 kph.
March is generally a mild month. The average temperature is of
13.7 °C, with a minimum of
7.3 °C and a maximum of
20.1 °C.
On the coldest nights of the month, the temperature usually drops to around
2.5 °C. However, it dropped to
0.1 °C in March 1998.
On the warmest days of the month, the temperature usually reaches around
26.5 °C. However, it reached
30.6 °C in March 2015.
Precipitation amounts to
45 mm, distributed over 8 days.
The day lasts on average 12 hours and 0 minutes.
The average humidity is 62%.
The average wind speed is of
10.4 kph.
April is generally a very mild month. However, there are remarkable differences between night and day. The average temperature is of
16.2 °C, with a minimum of
9.1 °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 °C in April 1999.
On the warmest days of the month, the temperature usually reaches around
32 °C. However, it reached
37.2 °C in April 2009.
Precipitation amounts to
25 mm, distributed over 5 days.
The day lasts on average 13 hours and 10 minutes.
The average humidity is 52%.
The average wind speed is of
12.9 kph.
May is generally a warm month. However, there are remarkable differences between night and day. The average temperature is of
19.9 °C, with a minimum of
12.1 °C and a maximum of
27.8 °C.
On the coldest nights of the month, the temperature usually drops to around
8 °C. However, it dropped to
5.6 °C in May 2010.
On the warmest days of the month, the temperature usually reaches around
36 °C. However, it reached
42 °C in May 2009.
Precipitation amounts to
15 mm, distributed over 3 days.
The day lasts on average 14 hours and 10 minutes. So the days are long.
The average humidity is 45%.
The average wind speed is of
14 kph.
June is generally a warm to hot month. However, there are remarkable differences between night and day. The average temperature is of
23.6 °C, with a minimum of
15.1 °C and a maximum of
32.1 °C.
On the coldest nights of the month, the temperature usually drops to around
11 °C. However, it dropped to
7.8 °C in June 1991.
On the warmest days of the month, the temperature usually reaches around
40 °C. However, it reached
43.9 °C in June 2009.
Precipitation amounts to only
5 mm, and all occurs in one day.
The day lasts on average 14 hours and 40 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
The average humidity is 40%.
The average wind speed is of
14.6 kph.
July, the hottest month of the year, is generally a warm to hot month. However, there are remarkable differences between night and day. The average temperature is of
26 °C, with a minimum of
17.1 °C and a maximum of
35 °C.
On the coldest nights of the month, the temperature usually drops to around
14 °C. However, it dropped to
11.1 °C in July 1999.
On the warmest days of the month, the temperature usually reaches around
41 °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.
The average humidity is 38%.
The average wind speed is of
13.5 kph.
August 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
16.7 °C and a maximum of
34.2 °C.
On the coldest nights of the month, the temperature usually drops to around
14 °C. However, it dropped to
11.1 °C in August 2010.
On the warmest days of the month, the temperature usually reaches around
40 °C. However, it reached
43.9 °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.
The average humidity is 40%.
The average wind speed is of
12.6 kph.
September is generally a warm to hot month. However, there are remarkable differences between night and day. The average temperature is of
23.2 °C, with a minimum of
14.8 °C and a maximum of
31.7 °C.
On the coldest nights of the month, the temperature usually drops to around
10.5 °C. However, it dropped to
7.2 °C in September 2007.
On the warmest days of the month, the temperature usually reaches around
38 °C. However, it reached
42.2 °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.
The average humidity is 43%.
The average wind speed is of
10.8 kph.
October is generally a warm month. However, there are remarkable differences between night and day. The average temperature is of
18.5 °C, with a minimum of
10.8 °C and a maximum of
26.1 °C.
On the coldest nights of the month, the temperature usually drops to around
5.5 °C. However, it dropped to
2 °C in October 1996.
On the warmest days of the month, the temperature usually reaches around
33 °C. However, it reached
37.2 °C in October 2001.
Precipitation amounts to
15 mm, distributed over 2 days.
The day lasts on average 11 hours and 10 minutes.
The average humidity is 52%.
The average wind speed is of
9.2 kph.
November is generally a mild month. The average temperature is of
12.5 °C, with a minimum of
6.2 °C and a maximum of
18.7 °C.
On the coldest nights of the month, the temperature usually drops to around
0.5 °C. However, it dropped to
-3 °C in November 2003.
On the warmest days of the month, the temperature usually reaches around
25.5 °C. However, it reached
29 °C in November 1997.
Precipitation amounts to
25 mm, distributed over 6 days.
The day lasts on average 10 hours and 5 minutes.
The average humidity is 69%.
The average wind speed is of
7.4 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
3.7 °C and a maximum of
13.4 °C.
On the coldest nights of the month, the temperature usually drops to around
-1.5 °C. However, it dropped to
-6.1 °C in December 1998.
On the warmest days of the month, the temperature usually reaches around
18.5 °C. However, it reached
21.7 °C in December 2014.
Precipitation amounts to
55 mm, distributed over 9 days.
The day lasts on average 9 hours and 35 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is of
7.9 kph.