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California · THREADEX · 1893–2026

Riverside, CA

33.953°N, 117.435°W · station RALthr · 134 years of record
92°F
forecast high · Sep 7

7-Day Forecast

NWS NDFD forecast high temperature for Riverside.
89°TUE9/188°WED9/287°THU9/389°FRI9/488°SAT9/591°SUN9/692°MON9/7

This Day in History

Every year's high on each of the next 7 forecast dates at Riverside — toggle a day below. The forecast line shows where it lands; the ringed bar is the hottest on record.

Ranks

#76 / 126
warmest Sep 7 in 126 yrs of record

Warmest Sep 7 ever

117°F
set in 2020

Coolest Sep 7 ever

72°F
set in 1929
Forecast high 92°F — 76th warmest Sep 7 of 126 years · record 117°F (2020) · warmest since 2025.
1893: 82°F1894: 90°F1895: 96°F1901: 85°F1902: 86°F1903: 93°F1904: 99°F1905: 83°F1906: 91°F1907: 97°F1908: 95°F1909: 84°F1910: 92°F1911: 94°F1912: 86°F1913: 94°F1914: 86°F1915: 89°F1916: 87°F1917: 96°F1918: 93°F1919: 84°F1920: 82°F1921: 95°F1922: 98°F1923: 105°F1924: 101°F1925: 81°F1926: 94°F1927: 89°F1928: 104°F1929: 72°F1930: 90°F1931: 98°F1932: 104°F1933: 96°F1934: 96°F1935: 89°F1936: 92°F1937: 97°F1938: 88°F1939: 87°F1940: 88°F1941: 85°F1942: 94°F1943: 94°F1944: 108°F1945: 102°F1946: 90°F1947: 87°F1948: 93°F1949: 107°F1950: 81°F1951: 95°F1952: 101°F1953: 100°F1954: 94°F1955: 110°F1956: 96°F1957: 102°F1958: 100°F1959: 92°F1960: 95°F1961: 90°F1962: 89°F1963: 97°F1964: 85°F1965: 78°F1966: 87°F1967: 94°F1968: 100°F1969: 100°F1970: 92°F1971: 98°F1972: 87°F1973: 89°F1974: 96°F1975: 93°F1976: 86°F1977: 102°F1978: 81°F1979: 100°F1980: 92°F1981: 96°F1982: 95°F1983: 95°F1984: 106°F1985: 84°F1986: 98°F1987: 96°F1988: 105°F1989: 91°F1990: 102°F1991: 87°F1993: 100°F1994: 97°F1995: 100°F1996: 95°F1997: 100°F1998: 92°F1999: 92°F2000: 98°F2001: 84°F2002: 85°F2003: 95°F2004: 100°F2005: 94°F2006: 97°F2007: 91°F2009: 92°F2010: 75°F2011: 104°F2012: 92°F2013: 102°F2014: 99°F2015: 100°F2016: 91°F2017: 96°F2018: 97°F2019: 96°F2020: 117°F2021: 94°F2022: 107°F2023: 93°F2024: 115°F2025: 98°F92° forecast707580859095100105110115120191019201930194019501960197019801990200020102020
📖 Riverside's full Climate Almanac →

The Numbers

Forecast high · Sep 792°F
Hottest this date since2025
This-date record117°F
This-date rank#76 of 126
Hottest at any time since2026
All-time record118°F (1917)
Odds to tie/break0.0% (daily)
Period of record1893–2026

Record Book

The hottest and coldest ever recorded at Riverside in each calendar month, and for the whole 1893–2026 record — with the year each was set.
MonthRecord HighRecord Low
Jan94°FJan 8, 192319°FJan 7, 1950
Feb94°FFeb 25, 192124°FFeb 16, 1903
Mar102°FMar 10, 191625°FMar 2, 1903
Apr105°FApr 6, 198929°FApr 4, 1970
May110°FMay 29, 198433°FMay 1, 1915
Jun118°FJun 16, 191735°FJun 11, 1894
Jul118°FJul 17, 192541°FJul 7, 1948
Aug113°FAug 24, 192640°FAug 27, 1902
Sep117°FSep 5, 202037°FSep 15, 1902
Oct109°FOct 1, 198030°FOct 30, 1971
Nov100°FNov 3, 201023°FNov 11, 1950
Dec94°FDec 3, 195821°FDec 26, 1911
All-time118°FJun 16, 191719°FJan 7, 1950

2026 Records So Far

Records set or tied at Riverside so far this year — through Aug 30.

Record Highs in 2026

9 broke
plus 1 tied — daily record highs set this year
Monthly high record this year: Mar (102°F)

Record Lows in 2026

0 broke
plus 0 tied — daily record lows set this year

Record Warm Nights & Cold Days

Two more daily records, kept separate from the rankings: the warmest a night has ever stayed (record high minimum) and the coldest a day has ever gotten (record low maximum) — the flip side of the usual record high and low.

Warmest low ever

80°F
record high minimum — the night it never cooled · Sep 21, 1939

Coldest high ever

37°F
record low maximum — the day it never warmed · Dec 13, 1932
MonthWarmest lowColdest high
Jan65°FJan 7, 200341°FJan 6, 1913
Feb72°FFeb 15, 201645°FFeb 1, 1923
Mar66°FMar 13, 201546°FMar 4, 1945
Apr63°FApr 2, 196052°FApr 4, 1965
May74°FMay 18, 200852°FMay 28, 1953
Jun74°FJun 26, 200661°FJun 3, 1925
Jul80°FJul 22, 200672°FJul 2, 1902
Aug79°FAug 17, 201269°FAug 29, 1951
Sep80°FSep 21, 193962°FSep 24, 1934
Oct74°FOct 1, 200853°FOct 22, 1941
Nov71°FNov 3, 195044°FNov 26, 1906
Dec67°FDec 16, 199837°FDec 13, 1932
All-time80°FSep 21, 193937°FDec 13, 1932

Hot Streaks

Current run

16 days
consecutive days with a high ≥ 90°F

Longest ever

66 days
record run, ended Aug 17 1981

So far in 2026

85 days
days with a high ≥ 90°F this year

Climate Normals

Normal high & low by month, from Riverside's own 1991–2020 record. Today's normal high: 94°F · forecast is -2° vs normal.
Jan: 69°FJan: 44°FFeb: 69°FFeb: 45°FMar: 73°FMar: 48°FApr: 77°FApr: 50°FMay: 81°FMay: 55°FJun: 88°FJun: 60°FJul: 94°FJul: 64°FAug: 96°FAug: 65°FSep: 93°FSep: 62°FOct: 84°FOct: 56°FNov: 76°FNov: 48°FDec: 68°FDec: 43°FJFMAMJJASOND

Sun & Location

Sun & Daylight Today

Sunrise5:23 AM
Sunset6:16 PM
Solar noon11:49 AM
Daylight12h 52m · losing 14 min/wk
Local standard time (no DST), level horizon.

Location

33.95°N, 117.44°W

Nearby Stations

Long Beach, CA41 mi WLos Angeles Downtown, CA46 mi WPalm Springs, CA54 mi ELos Angeles Airport, CA54 mi WBurbank Glendale Pasadena, CA55 mi WPalmdale, CA59 mi NW

The Last 6 Weeks

Riverside's observed daily high for the last six weeks — a white ring marks any day that broke or tied its daily record for that date.
Riverside, CA — last six weeks of daily high

2026 So Far

Every day this year against Riverside's own record — the record high, the normal, and the full span ever seen. A shareable look at where the year stands.
Riverside, CA — 2026 daily high trace
Download year chart

Every Day Since 1893

Each cell is one day's high at Riverside, coloured by temperature — 134 years of record, so heat waves read as warm streaks and cold snaps as blue.
Riverside, CA daily high heat map 1893–2026

Days Above the Mark

How many days a year hit a given high at Riverside — counted through Sep 7 each year, so you can see whether 2026 is running hot. Pick a threshold:
85 days ≥90°F so far in 2026 — tied for the 8th most in 134 years. Normal for this point: 67. Record: 97 in 1984.

Share Card

A ready-to-share summary of Riverside's outlook — post it, or link this page.
Riverside, CA hot share card
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