Weather on March 20

San Bernardino, CA

55 Years of Data

Avg High
74°F
Avg Low
47°F
Warmest
2026
81°F avg
Coldest
1991
45°F avg

About This Date

March 20th in San Bernardino, CA typically brings pleasant spring weather, with average highs around 74°F and lows near 47°F — a 27°F daily swing. Over 49 years of records, the warmest March 20th was in 2026 (81°F average), while the coldest was 1991 (45°F) — a 36°F range across recorded history. Rain or other precipitation has occurred on about 14% of March 20th dates historically, with the wettest March 20th recording 2.18" of rain.

Planning for March 20th in San Bernardino, CA? Great weather for outdoor activities.

Warming Trend
1.3°F per decade on this date
YearHighLowAvgPrecipSnow
2026warmest102°60°81°
202573°46°60°
201769°50°60°
201675°53°64°
201584°50°67°
201478°48°63°
201372°49°60°
201271°38°54°
201158°46°52°
201083°46°64°
200980°44°62°
200873°42°58°
200766°48°57°
200649°41°45°
200563°46°54°
200496°51°74°
200364°42°53°
200286°37°62°
200188°54°71°
200072°50°61°
199972°44°58°0.76"
199873°47°60°
199795°54°74°
199687°53°70°
199569°58°63°
199468°53°61°
199382°48°65°
199261°43°52°0.23"
1991coldest50°40°45°2.18"
199086°56°71°
198978°55°67°
198885°46°65°
198764°36°50°0.3"
198679°44°61°
198580°42°61°
198491°47°69°
198362°49°55°
198266°36°51°
198162°48°55°0.48"
198073°43°58°
197964°41°53°0.25"
197870°52°61°
197772°40°56°
197677°43°60°
197574°46°60°
197459°51°55°
197357°40°48°1.45"
197276°52°64°
197177°39°58°
49 years of data from NORTON AFB

Browse Weather History

Weather data provided by NOAA Climate Data Online. Not for critical planning.

March 20th Weather in San Bernardino, CA - 55 Years of History