Weather on June 21

San Jose, CA

55 Years of Data

Avg High
81°F
Avg Low
56°F
Warmest
1973
82°F avg
Coldest
1991
59°F avg

About This Date

June 21st in San Jose, CA typically brings warm summer weather, with average highs around 81°F and lows near 56°F — a 25°F daily swing. Over 55 years of records, the warmest June 21st was in 1973 (82°F average), while the coldest was 1991 (59°F) — a 23°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 3.2°F warmer on this date compared to 20-30 years ago.

The last decade has been 3.2°F warmer on this date compared to 20-30 years ago.

Planning for June 21st in San Jose, CA? Stay hydrated and seek shade during peak afternoon hours.

YearHighLowAvgPrecipSnow
202574°53°63°
202484°57°71°
202373°49°61°
2022102°60°81°
202178°57°68°
202082°58°70°
201979°56°67°
201880°55°68°
201791°59°75°
201690°59°74°
201573°56°64°
201472°54°63°
201380°53°67°
201267°53°60°
201196°65°80°
201085°53°69°
200975°51°63°
200897°66°81°
200781°54°67°
200695°61°78°
200573°55°64°
200473°57°65°
200373°55°64°
200269°55°62°
200190°62°76°
200090°62°76°
199972°56°64°
199878°55°67°
199777°55°66°
199673°52°62°
199588°55°71°
199478°51°65°
199374°57°65°
199291°58°74°
1991coldest69°48°59°
199087°66°77°
198997°58°77°
198881°57°69°
198773°61°67°
198693°55°74°
198582°59°71°
198481°49°65°
198381°53°67°
198274°58°66°
198197°65°81°
198074°54°64°
197974°50°62°
197874°56°65°
197792°57°74°
197672°54°63°
197572°52°62°
197486°56°71°
1973warmest101°64°82°
197277°54°65°
197188°55°71°
55 years of data from SAN JOSE

Browse Weather History

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