Excessive heat over a Mid-July weekend brought very hot temperatures to interior northern California and Major HeatRisk. Widespread triple digit temperatures were observed in the Valley and foothills. Redding Municipal Airport reached 111 degrees. Record high temperatures were set at Sacramento (109 degrees), Stockton (109) and Sacramento Executive Airport (107) for July 16th. Very warm overnight low temperatures were also observed, generally in the 70s to mid 80s. Records were set for overnight temperatures on July 17th, with Sacramento reaching 76 degrees, Sacramento Executive Airport reaching 72 degrees, and Modesto Airport reaching 75 degrees. Redding Municipal Airport tied it's previous record of 83 degrees for the morning low. Warmest lows were observed in northern Sacramento Valley and surrounding foothills.

Heat in NORTHERN SAN JOAQUIN VALLEY, CALIFORNIA
From 15-JUL-23 11:00:00 to 16-JUL-23 23:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Record high temperatures were set at Stockton on July 16th, reaching 109 degrees. Records were set for overnight low temperatures at Modesto Airport on July 17th, reaching 75 degrees.

Heat in MT SHASTA/WESTERN PLUMAS COUNTY, CALIFORNIA
From 15-JUL-23 11:00:00 to 16-JUL-23 23:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Daytime highs reached the upper 80s to near 105 degree range.

Heat in MOUNTAINS SOUTHWESTERN SHASTA COUNTY TO WESTERN COLUSA COUNTY, CALIFORNIA
From 15-JUL-23 11:00:00 to 16-JUL-23 23:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Daytime highs across the zone reached the 90s to 105 degrees on July 15 and 16. Overnight lows were in the mid 70s to low 80s.

Heat in SHASTA LAKE/NORTH SHASTA COUNTY, CALIFORNIA
From 15-JUL-23 11:00:00 to 16-JUL-23 23:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Overnight lows were in the low to mid 70s. Daytime highs were in the upper 90s to 105 degrees range across the zone on July 15 and 16.

Heat in BURNEY BASIN/EASTERN SHASTA COUNTY, CALIFORNIA
From 15-JUL-23 11:00:00 to 16-JUL-23 23:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Daytime highs were in the upper 90s to 105 degree range on July 15 and 16. Overnight lows were in the 60s.

Heat in WEST SLOPE NORTHERN SIERRA NEVADA, CALIFORNIA
From 15-JUL-23 11:00:00 to 16-JUL-23 23:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Daytime highs reached the mid 80s to near 100 degree range.

Heat in NORTHEAST FOOTHILLS/SACRAMENTO VALLEY, CALIFORNIA
From 15-JUL-23 11:00:00 to 16-JUL-23 23:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Daytime highs reached the upper 90s to 105 degree range, with overnight lows in the mid 70s to low 80s.

Heat in CARQUINEZ STRAIT AND DELTA, CALIFORNIA
From 15-JUL-23 11:00:00 to 16-JUL-23 23:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Daytime highs reached 100 to 106 degrees across the zone on July 15 and 16.

Heat in MOTHERLODE/CAMPTONVILLE TO GROVELAND, CALIFORNIA
From 15-JUL-23 11:00:00 to 16-JUL-23 23:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Daytime highs reached the upper 90s to 105 degree range, with overnight lows in the upper 70s to mid 80s.

Heat in CENTRAL SACRAMENTO VALLEY, CALIFORNIA
From 15-JUL-23 11:00:00 to 16-JUL-23 23:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Daytime highs reached 105 to 110 degrees on July 15 and 16. Overnight lows were in the upper 70s.

Heat in NORTHERN SACRAMENTO VALLEY, CALIFORNIA
From 15-JUL-23 11:00:00 to 16-JUL-23 23:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Redding Municipal Airport tied it's previous record of 83 degrees for the morning low. Across the zone, highs reached 105 to 110 degrees on July 15 and 16. Morning lows were in the upper 70s to mid 80s.

Heat in SOUTHERN SACRAMENTO VALLEY, CALIFORNIA
From 15-JUL-23 11:00:00 to 16-JUL-23 23:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Record high temperatures were set at Sacramento (109 degrees) and Sacramento Executive Airport (107) for July 16th.  Records were set for overnight temperatures on July 17th, with Sacramento reaching 76 degrees, and Sacramento Executive Airport reaching 72 degrees. Temperatures across the zone were in the 105 to 110 degree range, with overnight lows in the mid to upper 70s.