California, 2023Heat in California, September 7 to 12, 2023
September 7 to 12, 2023 · NWS SGX · 7 events in 7 counties and zones
A short-duration heat wave impacted inland locations during the second weekend of September. The Coachella Valley saw readings up to 110-115 degrees on September 9, with lows only falling into the 90s.
Every event with a place to put it; 7 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
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- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 7
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
A short-duration heat wave impacted inland locations during the second weekend of September. The Coachella Valley saw readings up to 110-115 degrees on September 9, with lows only falling into the 90s. Elsewhere, the Inland Empire, the San Diego County Valleys and the High Desert saw highs in the upper-90s to low-100s each day.
Heat, San Diego County Deserts
- When
- September 7, 10:00 AM PST to September 12, 7:00 PM PST
- Where
- San Diego County Deserts forecast zone
- Reported by
- AWOS
- Coordinates
- 33.028, -116.770 (the zone’s center; the record gives no point)
Hot temperatures impacted the Coachella Valley September 7-12, 2023. High temperatures reached the 100s to mid-110s each day, with overnight lows falling mainly into the 80s and 90s. The hottest temperatures occurred on September 9, when Borrego Springs reached 110 degrees.
Heat, Coachella Valley
- When
- September 7, 12:00 PM PST to September 12, 7:00 PM PST
- Where
- Coachella Valley forecast zone
- Reported by
- ASOS
- Coordinates
- 33.744, -115.994 (the zone’s center; the record gives no point)
Hot temperatures impacted the Coachella Valley September 7-12, 2023. High temperatures reached the 100s to mid-110s each day, with overnight lows falling mainly into the 80s and 90s. The hottest temperatures occurred on September 9:
Palm Springs: 115/84|Indio: 112/94|Thermal Airport: 112/93.
Heat, Riverside County Mountains
- When
- September 8, 10:00 AM PST to September 9, 7:00 PM PST
- Where
- Riverside County Mountains forecast zone
- Reported by
- AWOS
- Coordinates
- 33.744, -115.994 (the zone’s center; the record gives no point)
Hot temperatures impacted the Riverside County Mountains September 8-9, 2023. High temperatures reached the upper-80s to the mid-90s each day. The hottest temperatures occurred on September 9, when Anza reached 94 degrees, and Idyllwild reached 88 degrees.
Heat, San Bernardino and Riverside County Valleys - the Inland Empire
- When
- September 8, 10:00 AM PST to September 9, 7:00 PM PST
- Where
- San Bernardino and Riverside County Valleys - the Inland Empire forecast zone
- Reported by
- ASOS
- Coordinates
- 34.293, -116.086 (the zone’s center; the record gives no point)
Hot temperatures impacted the Inland Empire September 8-9, 2023. High temperatures reached the upper-90s to the low-100s each day, with overnight lows falling into the 60s and 70s. The hottest temperatures occurred on September 8:
Ontario: 98/72|Chino: 102/69|Riverside Airport: 100/72|San Jacinto: 100/71|Temecula: 98/70|San Bernardino: 99/72.
Heat, San Diego County Valleys
- When
- September 8, 10:00 AM PST to September 10, 7:00 PM PST
- Where
- San Diego County Valleys forecast zone
- Reported by
- ASOS
- Coordinates
- 33.028, -116.770 (the zone’s center; the record gives no point)
Hot temperatures impacted the San Diego County Valleys September 8-10, 2023. High temperatures reached the upper-90s, with overnight lows falling mainly into the 60s and 70s. The hottest temperatures occurred on September 8:
Ramona: 99/61|Poway: 97/66|Alpine: 96/69|Gillespie Field: 97/70|El Cajon: 97/70.
Heat, Apple and Lucerne Valleys
- When
- September 8, 12:00 PM PST to September 11, 6:00 PM PST
- Where
- Apple and Lucerne Valleys forecast zone
- Reported by
- AWOS
- Coordinates
- 34.841, -116.178 (the zone’s center; the record gives no point)
Hot temperatures impacted the High Desert September 8-11, 2023. High temperatures reached the upper-80s to the upper-90s each day, with overnight lows falling into the 60s and 70s. The hottest temperatures occurred on September 9, when Apple Valley reached 99 degrees, and Hesperia reached 94 degrees.
Heat, Orange County Inland
- When
- September 9, 10:00 AM PST to 7:00 PM PST
- Where
- Orange County Inland forecast zone
- Reported by
- ASOS
- Coordinates
- 33.677, -117.776 (the zone’s center; the record gives no point)
Hot temperatures impacted inland Orange County on September 9, 2023. High temperatures reached the upper-80s to the upper-90s, with overnight lows falling into the upper-60s and 70s. Highs/Lows from September 9:
Yorba Linda: 98/74|Los Alamitos: 92/69|Fullerton: 96/72|Santa Ana: 94/72|Lake Forest: 94/74.
- Heat
- Heat below excessive heat criteria that still caused deaths, injuries or significant impacts.
After NWS Directive 10-1605, the rules offices file Storm Data by.
- Hail and Damaging Winds in Pennsylvania, September 7, 20231 death · $60,000 · 1 in hail · 28 events
- Hail and Damaging Winds in New York, September 7, 2023$113,000 · 1 in hail · 46 events
- Hail and Damaging Winds in Louisiana, September 7 to 8, 20231 injured · $226,000 · 1.5 in hail · 21 events
- Hail and Damaging Winds in Maryland, September 7 to 8, 2023$203,000 · 1.5 in hail · 30 events
- Hail and Damaging Winds in Pennsylvania, September 7, 2023$149,000 · 1 in hail · 35 events
- Flash Flood and Hail in New York, September 7 to 10, 2023$10,000 · 1 in hail · 88 events
- Hail and Damaging Winds in Florida, September 7 to 12, 2023$94,000 · 1 in hail · 31 events
- Hail and Damaging Winds in Georgia, September 7, 2023$120,000 · 1.75 in hail · 20 events
- Hail and Damaging Winds in Virginia, September 7, 2023$69,000 · 1 in hail · 26 events
- Damaging Winds in Louisiana, September 7, 2023$80,000 · 52 kt wind · 11 events
- Damaging Winds in Georgia, September 7 to 8, 2023$104,000 · 55 kt wind · 4 events
- Hail and Damaging Winds in South Carolina, September 7, 20231 in hail · 50 events
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1139405, 1139364, 1139383, 1139404, 1139406, 1139353, 1139382.