Grand Junction 6ESE Weather Records (USC00053489)

The annual mean temperature here has risen by 0.3 C (0.2 to 0.4) per decade over 1964 to 2025. In Fahrenheit: 0.5 F (0.3 to 0.7) per decade. The slope is a straight line fitted to 61 complete years; the brackets give its 95 percent interval.

Across 61 years with a frost, the median last spring frost at Grand Junction 6ESE falls on 29 April and the median first autumn frost on 15 October, which leaves a median of 170 days between them.

In 1996 to 2025 the median growing season was 181 days. That is 17 days more than in 1964 to 1994.

Fitted over all years, the growing season changes by +4.2 days per decade at this station.

A day with at least 19.5 mm (0.8 in) of rain is expected about once in 2 years. A day with at least 34.9 mm (1.4 in) of rain is expected about once in 100 years.

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 51 years of values from 1964 to 2025.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 34.3 mm (1.4 in) in 1965; 32.3 mm (1.3 in) in 1969; 30.5 mm (1.2 in) in 1997.

One change was suspected in the annual mean temperature of Grand Junction 6ESE, at 2002. Each is measured against neighbouring stations.

• Relative to 5 neighbouring stations, the station's annual mean temperature from 2002 ran 0.2 C (0.4 F) lower than in the years before (possible change).