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Has the climate in Lathrop changed?

Lathrop has warmed about 1.7°F between 1971 and 2010.

About 0.4°F per decade, measured from Lathrop's official daily weather records, 1971–2010. Individual years still bounce around — some recent ones came in cool — but the long-term line has clearly risen.

Is that a lot? Lathrop's warming is broadly in line with other cities in United States — neither unusually fast nor unusually slow.

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
9 fewer nights
1970s
27 / yr
Recent
18 / yr
Milder winters — fewer frosts
Average temperature
+1.1°F
1970s
60.3°F
Recent
61.4°F
A steady upward drift
Hot days above 90°F
1 fewer day
1970s
70 / yr
Recent
69 / yr
Slightly fewer hot days
Rainy days
3 more days
1970s
63 / yr
Recent
66 / yr
Wetter on average

Lathrop's temperature, year by year

Average temperature for each year from 1971 to 2010.

57°59°61°63°1971: 58.9°F1972: 60.1°F1973: 61.0°F1974: 60.9°F1975: 60.2°F1976: 62.7°F1977: 60.6°F1978: 60.5°F1979: 60.3°F1980: 59.6°F1981: 61.0°F1982: 58.1°F1983: 61.0°F1984: 60.8°F1985: 58.8°F1986: 60.1°F1987: 59.0°F1989: 58.6°F1990: 60.0°F1991: 60.5°F1992: 59.0°F1993: 61.4°F1994: 60.7°F1995: 61.5°F1996: 62.0°F1997: 62.4°F1998: 60.2°F1999: 59.4°F2000: 60.4°F2001: 62.3°F2003: 62.8°F2004: 62.1°F2005: 62.1°F2006: 61.4°F2007: 61.5°F2008: 61.9°F2009: 61.2°F2010: 61.6°Flong-term trend19711980199020002010
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 10 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.

0.0°+0.5°+1.0°+1.5°+2.0°+2.5°January: +1.9°F+1.9JFebruary: +0.8°F+0.8FMarch: +2.1°F+2.1MApril: +1.4°F+1.4AMay: +1.4°F+1.4MJune: +1.8°F+1.8JJuly: +2.0°F+2.0JAugust: +2.2°F+2.2ASeptember: +2.1°F+2.1SOctober: +1.8°F+1.8ONovember: +1.8°F+1.8NDecember: +2.1°F+2.1D

August has warmed the most — about 2.2°F. The warming runs across the whole year, not just one season.

Methodology & sources

Temperature — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Lodi (NOAA GHCN station USC00045032), about 32 km from the city centre.

How we build these numbers →