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Has the climate in Hoffman Estates changed?

Hoffman Estates has warmed about 1.7°F between 1995 and 2011.

About 1.0°F per decade, measured from Hoffman Estates's official daily weather records, 1995–2011. Individual years still bounce around — some recent ones came in cool — but the long-term line has clearly risen.

Is that a lot? Hoffman Estates'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
12 fewer nights
1970s
156 / yr
Recent
144 / yr
Milder winters — fewer frosts
Average temperature
+0.6°F
1970s
48.5°F
Recent
49.0°F
A steady upward drift
Hot days above 90°F
2 more days
1970s
27 / yr
Recent
29 / yr
More days of serious heat
Rainy days
about the same
1970s
127 / yr
Recent
129 / yr
Rainfall pattern about the same

Hoffman Estates's temperature, year by year

Average temperature for each year from 1995 to 2011.

44°46°48°50°52°1995: 48.5°F1996: 46.0°F1997: 47.0°F1998: 51.6°F1999: 49.1°F2000: 47.5°F2001: 48.6°F2002: 49.5°F2003: 48.2°F2004: 48.8°F2005: 50.4°F2006: 50.1°F2007: 50.1°F2008: 46.8°F2009: 46.4°F2010: 51.0°F2011: 50.8°Flong-term trend1995200020102011
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 4 more freezing nights a year and about 4 more 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.

-2.5°-2.0°-1.5°-1.0°-0.5°0.0°+0.5°+1.0°+1.5°+2.0°+2.5°+3.0°January: +1.8°F+1.8JFebruary: -2.3°F-2.3FMarch: +0.7°F+0.7MApril: +2.7°F+2.7AMay: +1.7°F+1.7MJune: +1.2°F+1.2JJuly: +1.2°F+1.2JAugust: +1.1°F+1.1ASeptember: +1.8°F+1.8SOctober: +0.2°F+0.2ONovember: +2.2°F+2.2NDecember: +2.0°F+2.0D

April has warmed the most — about 2.7°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 Streamwood (NOAA GHCN station USC00118324), about 8 km from the city centre.

How we build these numbers →