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Has the climate in Laplace changed?

Laplace has warmed about 1.8°F between 1971 and 2010.

About 0.5°F per decade, measured from Laplace'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? Laplace'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
8 fewer nights
1970s
18 / yr
Recent
10 / yr
Milder winters — fewer frosts
Average temperature
+1.2°F
1970s
68.1°F
Recent
69.3°F
A steady upward drift
Hot days above 90°F
3 more days
1970s
76 / yr
Recent
79 / yr
More days of serious heat
Rainy days
12 fewer days
1970s
103 / yr
Recent
91 / yr
Drier on average

Laplace's temperature, year by year

Average temperature for each year from 1971 to 2010.

65°67°69°71°73°75°1971: 68.2°F1972: 68.6°F1973: 68.7°F1974: 68.5°F1975: 68.2°F1976: 66.6°F1977: 68.0°F1978: 67.4°F1979: 68.4°F1980: 68.8°F1981: 68.2°F1982: 68.9°F1983: 66.6°F1984: 68.2°F1985: 68.3°F1986: 69.2°F1987: 67.2°F1988: 66.7°F1989: 66.8°F1990: 68.9°F1991: 68.4°F1992: 66.8°F1993: 66.6°F1994: 66.7°F1995: 67.9°F1996: 67.3°F1997: 67.0°F1998: 69.9°F1999: 68.2°F2000: 68.8°F2001: 70.8°F2002: 68.8°F2003: 66.7°F2004: 69.1°F2005: 69.4°F2006: 69.8°F2007: 70.0°F2008: 68.9°F2010: 73.9°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 7 fewer freezing nights a year and about 16 fewer days above 90°F 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: +1.3°F+1.3JFebruary: +2.2°F+2.2FMarch: +1.1°F+1.1MApril: +1.4°F+1.4AMay: +1.4°F+1.4MJune: +1.0°F+1.0JJuly: +1.2°F+1.2JAugust: +1.6°F+1.6ASeptember: +1.7°F+1.7SOctober: +2.3°F+2.3ONovember: +0.4°F+0.4NDecember: +1.4°F+1.4D

October has warmed the most — about 2.3°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 Reserve (NOAA GHCN station USC00167767), about 10 km from the city centre.

How we build these numbers →