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Has the climate in Relizane changed?

Relizane has warmed about 3.1°F between 1989 and 2003.

About 2.1°F per decade, measured from Relizane's official daily weather records, 1989–2003. Individual years still bounce around — some recent ones came in cool — but the long-term line has clearly risen.

Is that a lot? Relizane's climate has warmed faster than most other cities in Algeria.

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
20 / yr
Recent
16 / yr
Milder winters — fewer frosts
Average temperature
+2.3°F
1970s
61.8°F
Recent
64.0°F
A steady upward drift
Hot days above 90°F
5 more days
1970s
72 / yr
Recent
77 / yr
More days of serious heat
Rainy days
21 fewer days
1970s
59 / yr
Recent
38 / yr
Drier on average

Relizane's temperature, year by year

Average temperature for each year from 1989 to 2003.

59°61°63°65°67°1989: 62.8°F1990: 63.8°F1991: 60.7°F1992: 60.6°F1993: 61.1°F1994: 63.6°F1995: 62.4°F1996: 61.6°F1997: 63.3°F1998: 62.1°F1999: 62.4°F2000: 62.9°F2001: 63.8°F2002: 64.3°F2003: 66.8°Flong-term trend1989199020002003
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 6 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.

-1.5°-1.0°-0.5°0.0°+0.5°+1.0°+1.5°+2.0°January: +1.9°F+1.9JFebruary: -1.2°F-1.2FMarch: -0.1°F-0.1MApril: +0.7°F+0.7AMay: +0.6°F+0.6MJune: +0.7°F+0.7JJuly: +0.3°F+0.3JAugust: -0.1°F-0.1ASeptember: -0.1°F-0.1SOctober: +0.2°F+0.2ONovember: +0.1°F+0.1NDecember: +0.9°F+0.9D

January has warmed the most — about 1.9°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 →