Climate averages 1991–2020

Merced weather
in July.

A very hot, very dry month: the warmest and one of the driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 36.2°C Daytime mean, July

Average low 20.2°C Night-time mean, July

Rainfall <1 mm Almost no rain

Daylight 14 h Sunrise to sunset, per day

July is a very hot month in Merced: daytime highs average 36.2°C and nights cool to about 20.2°C. By daytime temperature it is the warmest month of the year.

Rain is very rare: less than 1 mm falls in a typical July (one of the driest months of the year). Daylight, from sunrise to sunset, lasts about 14 h 28 min on an average July day.

The nearest other city in this atlas is Turlock (39 km away). In July its highs average 35.7°C, about as warm as Merced, with almost no rain (under 1 mm).

Among the 498 cities listed in the United States, Merced ranks 25th of 498 for the warmest July highs and joint 26th of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Merced is 5.9°C warmer than that mean.

From July to August, average highs fall by 0.9°C to 35.3°C, and monthly rainfall stays under 1 mm.

The annual picture

July in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Merced climate table

1991–2020

Monthly climate averages for Merced, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	14.2°C4.3°C	4.3°C	90	8.1	9.910 h
February	16.0°C5.6°C	5.6°C	80	8.5	10.811 h
March	18.9°C7.6°C	7.6°C	71	7.7	11.912 h
April	22.5°C9.9°C	9.9°C	32	4.7	13.113 h
May	27.8°C13.7°C	13.7°C	19	2.8	14.114 h
June	32.9°C17.3°C	17.3°C	3.6	0.6	14.715 h
July, selected	36.2°C20.2°C	20.2°C	0.6	0.2	14.514 h
August	35.3°C19.6°C	19.6°C	0.6	0.1	13.614 h
September	32.2°C17.3°C	17.3°C	1.7	0.4	12.512 h
October	26.0°C12.7°C	12.7°C	21	2.3	11.311 h
November	18.7°C7.6°C	7.6°C	37	4.8	10.210 h
December	13.9°C4.4°C	4.4°C	75	7.4	9.610 h

Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Compare places

July in nearby cities

Distance from Merced

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Merced) is explained once on the Merced year overview and on the Sources, method and limits page.