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Has the climate in Klamath Falls changed?

Klamath Falls has warmed about 2.1°F between 1971 and 2000.

About 0.7°F per decade, measured from Klamath Falls's official daily weather records, 1971–2000. Individual years still bounce around — some recent ones came in cool — but the long-term line has clearly risen.

Is that a lot? Klamath Falls's climate has warmed faster than most other cities in United States.

What has actually changed

Each card compares the 1970s (the first ten years of the record) with recent years (the last ten) — the same span the headline and the chart use.

Freezing nights
32 fewer nights
1970s
164 / yr
Recent
132 / yr
Milder winters — fewer frosts
Average temperature
+1.7°F
1970s
47.9°F
Recent
49.5°F
A steady upward drift
Hot days above 90°F
1 more day
1970s
25 / yr
Recent
26 / yr
More days of serious heat
Rainy days
5 fewer days
1970s
87 / yr
Recent
82 / yr
Drier on average

Klamath Falls's temperature, year by year

Average temperature for each year from 1971 to 2000.

44°46°48°50°52°54°1971: 46.7°F1972: 47.8°F1973: 48.7°F1974: 48.9°F1975: 46.9°F1976: 47.7°F1977: 47.7°F1978: 47.6°F1979: 48.5°F1980: 48.3°F1981: 49.7°F1982: 45.5°F1983: 47.7°F1984: 47.3°F1985: 46.7°F1986: 50.4°F1987: 49.9°F1988: 49.1°F1989: 45.3°F1990: 48.3°F1991: 49.6°F1992: 52.3°F1993: 47.0°F1994: 49.6°F1995: 50.8°F1996: 50.5°F1997: 50.1°F1998: 48.8°F1999: 47.4°F2000: 49.5°Flong-term trend1971198019902000
a warmer-than-average year a cooler-than-average year

Each bar is one year. Most recent years sit above the older ones. Some recent years still came in cool — warming is a slope, not a straight climb.

In day-to-day terms, that long-term shift shows up as about 26 fewer freezing nights a year compared with the 1970s.

When in the year the change shows up

How much warmer each month is now than in the 1970s. Useful if you garden or care about a particular season — otherwise the headline above already has the answer.

-3.5°-3.0°-2.5°-2.0°-1.5°-1.0°-0.5°0.0°+0.5°+1.0°January: +0.2°F+0.2JFebruary: -1.6°F-1.6FMarch: -2.0°F-2.0MApril: -3.0°F-3.0AMay: -2.4°F-2.4MJune: -2.8°F-2.8JJuly: -0.2°F-0.2JAugust: +0.2°F+0.2ASeptember: +0.2°F+0.2SOctober: -0.6°F-0.6ONovember: +0.4°F+0.4NDecember: -0.3°F-0.3D

April has cooled the most — about 3.0°F. The warming runs across the whole year, not just one season.

Methodology & sources

Temperature — modelled for this location from ERA5-Land reanalysis, a ~9 km global grid, because no long-record weather station is close enough to use.

How we build these numbers →