Clayton climate

Clayton Weather in March

NOAA 1991-2020 normals for Mt Diablo Junction, 6.9 km from Clayton

Average highs run from 56°F on March 1 to 60°F on March 31, and lows from 42°F to 43°F. Normal precipitation for the month is 3.69 in over about 10 wet days.

March day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Clayton, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

March at a glance

Average high
58°F
Average low
43°F
Precipitation
3.69 in
Snowfall
0.1 in
Record high
89°FMar 20, 2026
Record low
33°FMar 2, 2023
Chance of a freeze
41%
Daylight
11 h 22 min to 12 h 36 min
Cloud cover
51%
Humidity
80%
Dew point
46°F
Wind
7.6 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Mar 156°F42°F74°F 201635°F 202338%1%
Mar 256°F42°F73°F 201633°F 202338%1%
Mar 356°F43°F77°F 202037°F 200238%1%
Mar 456°F43°F79°F 202036°F 201837%1%
Mar 557°F43°F74°F 201235°F 201837%1%
Mar 657°F43°F75°F 201536°F 202236%1%
Mar 757°F43°F77°F 201535°F 202236%1%
Mar 857°F43°F78°F 200433°F 200236%1%
Mar 957°F43°F81°F 200435°F 200235%1%
Mar 1057°F43°F84°F 200434°F 200935%1%
Mar 1157°F43°F81°F 200535°F 200635%1%
Mar 1257°F43°F83°F 202637°F 201234%1%
Mar 1358°F43°F82°F 200435°F 200634%1%
Mar 1458°F43°F85°F 201536°F 200234%1%
Mar 1558°F43°F85°F 200438°F 200233%1%
Mar 1658°F43°F85°F 200437°F 202133%1%
Mar 1758°F43°F85°F 202637°F 200233%1%
Mar 1858°F43°F86°F 202636°F 200232%1%
Mar 1958°F43°F87°F 202635°F 201232%1%
Mar 2058°F43°F89°F 202641°F 200232%1%
Mar 2159°F43°F85°F 202639°F 202131%1%
Mar 2259°F43°F85°F 202238°F 201331%0%
Mar 2359°F43°F82°F 202635°F 200931%0%
Mar 2459°F43°F83°F 202639°F 200030%0%
Mar 2559°F43°F84°F 202538°F 202330%0%
Mar 2659°F43°F82°F 201536°F 202030%0%
Mar 2759°F43°F81°F 202637°F 202329%0%
Mar 2859°F43°F83°F 202636°F 200729%0%
Mar 2959°F43°F88°F 202640°F 200729%0%
Mar 3060°F43°F83°F 201138°F 200528%0%
Mar 3160°F43°F83°F 202138°F 200828%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Clayton, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (PDT).

March 1
sunrise 6:39 AM, sunset 6:01 PM
March 31
sunrise 6:54 AM, sunset 7:30 PM

Every day of March: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00045915 (Mt Diablo Junction), public domain. Records: NOAA GHCN-Daily, station USW00023254, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.