Merced, CA Climate

Summary Graph

The summary climate graph for Merced, CA shows a selection of temperature, rainfall and snow minimum, mean and maximum measures over the course of a year. Click on each of the measures in the key to toggle them on and off.

Graph of average and extreme temperature ranges by day for Merced, CA.


The warmest month in Castle, Merced, California is July with an average high temperature of 95.6°F. The hottest day on record was June 16 1961 when the temperature hit 111.9°F. During January the overnight temperature drops to an average of 38.5°F with the lowest temperature of 19.0°F being recorded on December 14 1967.

Warmest Days

Warmest Months

Coldest Days

Coldest Months

The warmest days on record are:

16 Jun 1961111.9°F
19 Jul 2009111.2°F
25 Aug 2010111.2°F
12 Jul 1961111°F
11 Jul 1959109.9°F

The warmest months on average were:

July 1961100.9°F
July 2009100.2°F
July 1970100°F
July 195099.5°F
July 195399.3°F

The coldest days on record are:

14 Dec 196719°F
14 Dec 200719.4°F
11 Jan 194921°F
17 Jan 201221.2°F
19 Jan 196321.9°F

The coldest months on average were:

January 194929.8°F
January 196331.3°F
December 201131.4°F
December 197632°F
December 196732°F


The wettest month by average rainfall in Merced, CA is March with an average of 1.1 inches of rain falling on 9 to 10 days.Although in January it typically rains on more days with 0.9 inches falling in 11 to 12 days. The driest month by average rainfall in Merced, CA is August with an average of 0.0 inches of rain falling on 0 to 1 days. Although in July it typically rains on less days with 0.0 inches falling in 0 to 1 days

Wettest Days

The wettest days on record are:

23 January 19811.4 inches
15 January 19791.4 inches
25 January 19951.3 inches
17 January 19781.1 inches
19 January 19831 inches

Wettest Months

The wettest months on record are:

March 19916.1 inches
January 19785.8 inches
March 19835.7 inches
January 19955.6 inches
January 19815.1 inches

Driest Months

The driest months on record are:

December 20120 inches
February 19420 inches
March 19420 inches
April 19420 inches
May 19420 inches
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