2010: Fresno set a record high of 101° F beating the old record of 99° F set back in 1991.
This old record was the only record high maximum temperature that was below 100° F degrees for
September.
All of the record high maximum temperatures for Fresno for the month of
September are now in the triple digits.
2001: Thunderstorms developed in mountains and inland valleys of Southern California each day starting on this day and ending on 10.1.
Flooding was reported in Beaumont.
One was killed by lightning at Cuyamaca Rancho State Park.
1988: Fresno set a high of 99° F, making it the only day during the month of
September the city has never seen a triple digit high temperature.
1982: It was 49° F in Borrego Springs, the lowest temperature on record for
September.
This also occurred on 9.27.1986 and 9.
30.1971.
1980: The high temperature at Lovelock, NV was 90° F.
1971: Caribbean Sea Hurricane Irene crossed Nicaragua and reformed in the eastern Pacific as Hurricane Olivia.
Olivia recurved to the northeast and made landfall in central Baja
California with rainfall of up to 1" in the southern deserts on this day and on 10.1.
This occurred during the La Niña of 1970-71.
1971: 4" of snow fell at Donner Memorial State Park.
1970: Drought in Southern
California climaxed and hot Santa Ana winds blew starting on 9.25 and ending on this day.
Winds peaked at 60 mph at Cuyamaca.
The winds sparked the Laguna Fire, one of the largest in
California history.
Eight were killed, 400 homes were destroyed, and 185,000 acres were burned as of 9.28 from Cuyamaca to Alpine.
In all, the fire consumed whole communities of interior San Diego County.
500,000 acres were burned and caused fifty million dollars in damage.
1950: Livermore had a low temperature of 35° F. 1950: Fresno reached a chilly 37° F for a low temperature, establishing a record low for the month.
This is also the earliest low temperature in the season below 40° F on record in Fresno.
Frost was reported in the Fresno area as well for the earliest time ever.
1950: The morning low temperature at Reno, NV was 21° F.
1946: Woodfords recorded 1.27" of precipitation.1946: A tropical storm moved northward into northern Baja
California and dissipated with rainfall of up to 4" in the mountains on this day and exceeding 4" in the mountains on 10.1.
This occurred during the El Niño of 1946-47.
1932: Flash flood at Woodfords generated a 45-foot wall of water which killed 15 people and destroyed several locomotives.
Flash flooding also occurred in the Tehachapi Mountains
1932: Heavy rains starting on 9.28 and ending on 10.1 came from a dying tropical cyclone.
It brought flooding to parts of the mountains and deserts of Southern
California.
4.38" of rain fell at Tehachapi in 7 hours on this day.
Floods in Tehachapi resulted in 15 deaths.
1930: It was 46° in Palm Springs, the lowest temperature on record for
September.
1921: 1.23" of rain fell in San Diego, the greatest daily amount on record for
September.
1.5" fell on this day and on 10.1, the greatest 24-hour total on record for
September.
1921: A tropical storm crossed the Baja peninsula southwest of Yuma, AZ, and moved up the Colorado River Valley.
Several stations along the Colorado River reported in excess of 3" of rain, including 3.65" at Yuma.
Other amounts included 1.5" at Flagstaff, 1.24" at Prescott, 0.68" at Tucson, and 0.56" at Phoenix, AZ.
1894: Fresno had its' coldest maximum on record for the month of
September – the high this day reached only 56° F.
Source: NWS San Francisco/Monterey, Hanford, Reno, Phoenix, & San Diego
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A fireman near Los Angeles searches for water in the aftermath of 1994's Northridge quake. 
Phreatic eruption: Mount Ontake. 
