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Has the climate in Rockville Centre changed?

How Rockville Centre's climate has changed

About 0.1°F per decade, measured from Rockville Centre's official daily weather records, 1995–2009. Individual years still bounce around — some recent ones came in cool — but the long-term line has clearly risen.

Is that a lot? Rockville Centre's climate has warmed more slowly 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
4 fewer nights
1970s
93 / yr
Recent
89 / yr
Milder winters — fewer frosts
Average temperature
+0.3°F
1970s
53.5°F
Recent
53.8°F
A steady upward drift
Hot days above 90°F
6 fewer days
1970s
11 / yr
Recent
5 / yr
Slightly fewer hot days
Rainy days
21 more days
1970s
139 / yr
Recent
160 / yr
Wetter on average

Rockville Centre's temperature, year by year

Average temperature for each year from 1995 to 2009.

50°52°54°56°1995: 53.5°F1996: 52.6°F1997: 53.3°F1998: 54.1°F1999: 53.9°F2000: 55.0°F2001: 54.4°F2002: 55.4°F2003: 52.9°F2004: 53.8°F2005: 54.2°F2006: 55.9°F2007: 53.7°F2008: 53.1°F2009: 51.8°Flong-term trend199520002009
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.

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.

-2.5°-2.0°-1.5°-1.0°-0.5°0.0°+0.5°+1.0°January: -2.2°F-2.2JFebruary: -1.6°F-1.6FMarch: -1.2°F-1.2MApril: +0.3°F+0.3AMay: +0.1°F+0.1MJune: -0.6°F-0.6JJuly: +0.6°F+0.6JAugust: -0.1°F-0.1ASeptember: +0.0°F+0.0SOctober: -0.2°F-0.2ONovember: +0.2°F+0.2NDecember: -0.1°F-0.1D

January has cooled 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 Laguardia AP (NOAA GHCN station USW00014732), about 24 km from the city centre.

How we build these numbers →