Ryegate 18 NNW Weather Records (USC00247263)

Record envelope, standing records and threshold days for Ryegate 18 NNW (USC00247263), Montana, United States, with 65 years of record.

Key Facts for Ryegate 18 NNW

Ryegate 18 NNW (USC00247263) is a weather station in Montana, United States at 46.53 latitude and -109.34 longitude, 1,353 m (4,440 ft) above sea level.
The station reports from 1962 to 2026, 65 years of record.
1,464 records set at Ryegate 18 NNW still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Ryegate 18 NNW set a daily record high maximum temperature of 28.3 C (82.9 F) on 10 October 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

Location: Montana, United States, 46.53 latitude, -109.34 longitude.
Elevation: 1,353 m (4,440 ft).
Period of record: 1962 to 2026, 65 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

17 days at or beyond a record

The band shows the record high and record low for each calendar day at Ryegate 18 NNW. The lines show the 2026 daily maximum and minimum. 17 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Ryegate 18 NNW, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	19.4 C (66.9 F)	-42.2 C (-44.0 F)	16.7 C (62.1 F)	-26.1 C (-15.0 F)
Feb	22.8 C (73.0 F)	-40.6 C (-41.1 F)	21.7 C (71.1 F)	-23.3 C (-9.9 F)
Mar	26.7 C (80.1 F)	-35.6 C (-32.1 F)	26.7 C (80.1 F)	-21.1 C (-6.0 F)
Apr	30.0 C (86.0 F)	-23.3 C (-9.9 F)	26.7 C (80.1 F)	-12.2 C (10.0 F)
May	33.9 C (93.0 F)	-10.6 C (12.9 F)	31.1 C (88.0 F)	-10.0 C (14.0 F)
Jun	37.8 C (100.0 F)	-6.1 C (21.0 F)	29.4 C (84.9 F)	0.0 C (32.0 F)
Jul	41.1 C (106.0 F)	0.0 C (32.0 F)	41.1 C (106.0 F)	7.8 C (46.0 F)
Aug	37.8 C (100.0 F)	-2.2 C (28.0 F)	37.2 C (99.0 F)	3.3 C (37.9 F)
Sep	37.2 C (99.0 F)	-12.2 C (10.0 F)	30.6 C (87.1 F)	-1.1 C (30.0 F)
Oct	35.0 C (95.0 F)	-26.1 C (-15.0 F)	29.4 C (84.9 F)	-0.6 C (30.9 F)
Nov	26.1 C (79.0 F)	-32.2 C (-26.0 F)	n/a	n/a
Dec	18.9 C (66.0 F)	-41.1 C (-42.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Ryegate 18 NNW still stand. 1992 holds the most, with 51.

Standing records at Ryegate 18 NNW by the year they were set
Year set	Standing records
1962	6
1963	35
1964	14
1965	37
1966	23
1967	15
1968	26
1969	30
1970	11
1971	26
1972	29
1973	17
1974	21
1975	20
1976	17
1977	20
1978	18
1979	11
1980	19
1981	19
1982	14
1983	21
1984	22
1985	42
1986	23
1987	26
1988	40
1989	28
1990	18
1991	23
1992	51
1993	19
1994	21
1995	25
1996	48
1997	22
1998	18
1999	25
2000	16
2001	13
2002	35
2003	27
2004	18
2005	31
2006	15
2007	14
2008	19
2009	31
2010	15
2011	13
2012	20
2013	22
2014	20
2015	23
2016	13
2017	15
2018	16
2019	28
2020	26
2021	34
2022	31
2023	16
2024	17
2025	11
2026	25

All-Time Record Progression

5 new records

5 all-time records were set at Ryegate 18 NNW between 25 July 1999 and 13 July 2026. Each dot is a new record.

When Ryegate 18 NNW set new all-time records
Date	Kind	Detail
1999-07-25	Record high maximum temperature	Record high maximum temperature 38.3 C (100.9 F)
1999-07-29	Record high maximum temperature	Record high maximum temperature 38.9 C (102.0 F)
2013-06-21	Record daily precipitation	Record daily precipitation 70.6 mm (2.8 in)
2024-01-13	Record low minimum temperature	Record low minimum temperature -42.2 C (-44.0 F)
2026-07-13	Record high maximum temperature	Record high maximum temperature 41.1 C (106.0 F)

Wettest Day of Each Month

Jun: 70.6 mm (2.8 in)

The wettest day on record for each calendar month at Ryegate 18 NNW. The most was 70.6 mm (2.8 in) on 21 June 2013.

Record daily precipitation for each month at Ryegate 18 NNW
Month	Record daily precipitation (mm)	Date
Jan	15.2 mm (0.6 in)	11 January 1988
Feb	14.5 mm (0.6 in)	21 February 1967
Mar	22.1 mm (0.9 in)	5 March 1999
Apr	35.6 mm (1.4 in)	20 April 1973
May	47.5 mm (1.9 in)	25 May 2011
Jun	70.6 mm (2.8 in)	21 June 2013
Jul	35.6 mm (1.4 in)	30 July 1975
Aug	57.2 mm (2.3 in)	20 August 1990
Sep	34.8 mm (1.4 in)	9 September 1995
Oct	33.0 mm (1.3 in)	8 October 1993
Nov	19.1 mm (0.8 in)	8 November 2020
Dec	17.8 mm (0.7 in)	30 December 2017

Period of Record Coverage

1962 to 2026

65 years of record at Ryegate 18 NNW, 1962 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 1962, 1990, 2026.

Days with data per year at Ryegate 18 NNW
Year	Days with data	Share of year	Complete
1962	139	38%	No
1963	365	100%	Yes
1964	361	99%	Yes
1965	335	92%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	362	99%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	364	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	365	100%	Yes
1977	361	99%	Yes
1978	363	99%	Yes
1979	363	99%	Yes
1980	364	99%	Yes
1981	363	99%	Yes
1982	347	95%	Yes
1983	361	99%	Yes
1984	360	98%	Yes
1985	361	99%	Yes
1986	359	98%	Yes
1987	362	99%	Yes
1988	364	99%	Yes
1989	363	99%	Yes
1990	268	73%	No
1991	362	99%	Yes
1992	363	99%	Yes
1993	360	99%	Yes
1994	358	98%	Yes
1995	361	99%	Yes
1996	361	99%	Yes
1997	364	100%	Yes
1998	365	100%	Yes
1999	365	100%	Yes
2000	362	99%	Yes
2001	357	98%	Yes
2002	363	99%	Yes
2003	365	100%	Yes
2004	365	100%	Yes
2005	364	100%	Yes
2006	337	92%	Yes
2007	364	100%	Yes
2008	357	98%	Yes
2009	350	96%	Yes
2010	356	98%	Yes
2011	364	100%	Yes
2012	363	99%	Yes
2013	362	99%	Yes
2014	365	100%	Yes
2015	363	99%	Yes
2016	366	100%	Yes
2017	365	100%	Yes
2018	365	100%	Yes
2019	365	100%	Yes
2020	366	100%	Yes
2021	365	100%	Yes
2022	364	100%	Yes
2023	360	99%	Yes
2024	366	100%	Yes
2025	363	99%	Yes
2026	284	78%	No

Latest Records

Latest records at Ryegate 18 NNW
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
10 October 2026	Ryegate 18 NNW, US	daily high max (Provisional)	28.3 C (82.9 F)	0.5 C (0.9 F)	11 years	9 of 100 (Routine)
4 August 2026	Ryegate 18 NNW, US	daily low min	3.3 C (37.9 F)	1.1 C (2.0 F)	44 years	22 of 100 (Routine)
4 August 2026	Ryegate 18 NNW, US	daily low max (Tie)	18.3 C (64.9 F)	tie	32 years	3 of 100 (Routine)
2 August 2026	Ryegate 18 NNW, US	daily high max	37.2 C (99.0 F)	1.6 C (2.9 F)	21 years	15 of 100 (Routine)
13 July 2026	Ryegate 18 NNW, US	all-time high max	41.1 C (106.0 F)	2.2 C (4.0 F)	26 years	39 of 100 (Notable)
12 July 2026	Ryegate 18 NNW, US	daily high max	37.2 C (99.0 F)	1.6 C (2.9 F)	24 years	16 of 100 (Routine)
11 July 2026	Ryegate 18 NNW, US	daily high min	16.1 C (61.0 F)	0.5 C (0.9 F)	52 years	22 of 100 (Routine)
29 June 2026	Ryegate 18 NNW, US	daily low max	11.1 C (52.0 F)	3.9 C (7.0 F)	57 years	30 of 100 (Routine)
1 June 2026	Ryegate 18 NNW, US	daily rain	27.9 mm (1.1 in)	7.6 mm (0.30 in)	28 years	22 of 100 (Routine)
30 May 2026	Ryegate 18 NNW, US	daily high min	12.2 C (54.0 F)	0.5 C (0.9 F)	60 years	25 of 100 (Routine)
30 May 2026	Ryegate 18 NNW, US	daily high max	31.1 C (88.0 F)	0.5 C (0.9 F)	41 years	18 of 100 (Routine)
29 May 2026	Ryegate 18 NNW, US	daily high max	31.1 C (88.0 F)	1.1 C (2.0 F)	41 years	19 of 100 (Routine)
28 May 2026	Ryegate 18 NNW, US	daily high min	13.3 C (55.9 F)	0.5 C (0.9 F)	60 years	25 of 100 (Routine)
28 May 2026	Ryegate 18 NNW, US	daily high max	29.4 C (84.9 F)	0.5 C (0.9 F)	60 years	24 of 100 (Routine)
27 May 2026	Ryegate 18 NNW, US	daily high min	13.9 C (57.0 F)	2.8 C (5.0 F)	23 years	19 of 100 (Routine)
6 May 2026	Ryegate 18 NNW, US	daily low min	-10.0 C (14.0 F)	5.0 C (9.0 F)	15 years	22 of 100 (Routine)
25 March 2026	Ryegate 18 NNW, US	daily high min	2.8 C (37.0 F)	0.6 C (1.1 F)	32 years	15 of 100 (Routine)
21 March 2026	Ryegate 18 NNW, US	monthly high max	26.7 C (80.1 F)	1.7 C (3.1 F)	21 years	24 of 100 (Routine)
20 March 2026	Ryegate 18 NNW, US	daily high min	6.1 C (43.0 F)	0.5 C (0.9 F)	37 years	17 of 100 (Routine)
20 March 2026	Ryegate 18 NNW, US	daily high max	22.8 C (73.0 F)	0.6 C (1.1 F)	28 years	14 of 100 (Routine)

Climate Trend

60 complete years, 1963 to 2025

One stripe for each of 60 complete years at Ryegate 18 NNW, 1963 to 2025. Blue stripes are years cooler than the station's own mean of 6.3 C (43.3 F); red stripes are warmer. The coolest year was 1975, at 4.2 C (39.6 F), and the warmest was 1999, at 7.9 C (46.3 F). The strongest colour marks a difference of 2.1 C (3.8 F).

Annual mean temperature at Ryegate 18 NNW as warming stripes, 1963 to 2025
Year	Annual mean temperature	Difference from the station mean
1963	6.8 C	+0.52 C
1964	5.7 C	-0.63 C
1966	5.9 C	-0.38 C
1967	5.6 C	-0.65 C
1968	5.3 C	-1.00 C
1969	5.6 C	-0.73 C
1970	5.4 C	-0.89 C
1971	5.5 C	-0.79 C
1972	5.4 C	-0.88 C
1973	6.2 C	-0.10 C
1974	6.6 C	+0.31 C
1975	4.2 C	-2.06 C
1976	6.7 C	+0.38 C
1977	6.2 C	-0.04 C
1978	4.4 C	-1.92 C
1979	5.5 C	-0.75 C
1980	6.1 C	-0.17 C
1981	7.1 C	+0.78 C
1982	4.7 C	-1.60 C
1983	6.2 C	-0.13 C
1984	6.2 C	-0.04 C
1985	5.0 C	-1.24 C
1986	6.9 C	+0.61 C
1987	7.5 C	+1.26 C
1988	7.5 C	+1.25 C
1989	5.6 C	-0.73 C
1991	7.2 C	+0.90 C
1992	7.5 C	+1.25 C
1993	5.8 C	-0.53 C
1994	7.5 C	+1.23 C
1995	6.7 C	+0.42 C
1996	5.2 C	-1.07 C
1997	6.5 C	+0.25 C
1998	7.6 C	+1.34 C
1999	7.9 C	+1.66 C
2000	6.4 C	+0.15 C
2001	7.5 C	+1.17 C
2002	5.8 C	-0.45 C
2003	7.0 C	+0.67 C
2004	7.1 C	+0.79 C
2005	6.7 C	+0.39 C
2007	7.1 C	+0.82 C
2008	5.9 C	-0.43 C
2009	5.5 C	-0.75 C
2010	6.1 C	-0.18 C
2011	5.6 C	-0.67 C
2012	7.4 C	+1.08 C
2013	6.2 C	-0.06 C
2014	5.7 C	-0.56 C
2015	7.5 C	+1.19 C
2016	7.2 C	+0.90 C
2017	6.5 C	+0.21 C
2018	5.2 C	-1.11 C
2019	4.4 C	-1.92 C
2020	6.4 C	+0.12 C
2021	6.7 C	+0.44 C
2022	6.0 C	-0.32 C
2023	6.9 C	+0.59 C
2024	7.4 C	+1.12 C
2025	7.0 C	+0.74 C

The annual mean temperature here has risen by 0.14 C (0.02 to 0.27) per decade over 1963 to 2025. In Fahrenheit: 0.26 F (0.03 to 0.48) per decade. The slope is a straight line fitted to 60 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Ryegate 18 NNW
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.14 C (0.02 to 0.27) per decade	0.26 F (0.03 to 0.48) per decade	1963 to 2025	60	Rise
Mean daily maximum	0.16 C (0.01 to 0.32) per decade	0.29 F (0.01 to 0.57) per decade	1963 to 2025	60	Rise
Mean daily minimum	0.13 C (0.02 to 0.23) per decade	0.23 F (0.03 to 0.42) per decade	1963 to 2025	60	Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1962 to 2026

Yearly extremes at Ryegate 18 NNW: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	41.1 C (106.0 F)	2026	35.6 C (96.1 F)	65
Coldest night (TNn)	-42.2 C (-44.0 F)	2024	-32.8 C (-27.0 F)	65
Wettest day (Rx1day)	70.6 mm (2.8 in)	2013	30.7 mm (1.2 in)	65
Wettest five days (Rx5day)	97.9 mm (3.9 in)	1992	42.0 mm (1.7 in)	65
Longest dry spell (CDD)	75 days	1987	36 days	65

Hottest day (TXx)

The hottest day of the year at Ryegate 18 NNW, 1962 to 2026. The record is 41.1 C (106.0 F) in 2026, marked on the chart; the median year is 35.6 C (96.1 F).

Hottest day (TXx) at Ryegate 18 NNW by year
Year	Hottest day (TXx)
1962	33.3 C (91.9 F)
1963	36.7 C (98.1 F)
1964	36.7 C (98.1 F)
1965	33.3 C (91.9 F)
1966	36.1 C (97.0 F)
1967	33.3 C (91.9 F)
1968	32.2 C (90.0 F)
1969	36.7 C (98.1 F)
1970	35.6 C (96.1 F)
1971	36.7 C (98.1 F)
1972	32.8 C (91.0 F)
1973	36.1 C (97.0 F)
1974	34.4 C (93.9 F)
1975	35.0 C (95.0 F)
1976	36.1 C (97.0 F)
1977	33.9 C (93.0 F)
1978	34.4 C (93.9 F)
1979	35.0 C (95.0 F)
1980	35.0 C (95.0 F)
1981	34.4 C (93.9 F)
1982	32.2 C (90.0 F)
1983	37.2 C (99.0 F)
1984	36.7 C (98.1 F)
1985	36.7 C (98.1 F)
1986	36.7 C (98.1 F)
1987	32.8 C (91.0 F)
1988	37.8 C (100.0 F)
1989	36.7 C (98.1 F)
1990	36.1 C (97.0 F)
1991	35.0 C (95.0 F)
1992	35.0 C (95.0 F)
1993	32.2 C (90.0 F)
1994	34.4 C (93.9 F)
1995	36.7 C (98.1 F)
1996	37.2 C (99.0 F)
1997	35.6 C (96.1 F)
1998	36.7 C (98.1 F)
1999	38.9 C (102.0 F)
2000	37.8 C (100.0 F)
2001	37.8 C (100.0 F)
2002	38.9 C (102.0 F)
2003	37.2 C (99.0 F)
2004	35.6 C (96.1 F)
2005	35.0 C (95.0 F)
2006	36.7 C (98.1 F)
2007	37.8 C (100.0 F)
2008	35.6 C (96.1 F)
2009	32.8 C (91.0 F)
2010	35.0 C (95.0 F)
2011	34.4 C (93.9 F)
2012	35.6 C (96.1 F)
2013	33.3 C (91.9 F)
2014	34.4 C (93.9 F)
2015	35.0 C (95.0 F)
2016	33.9 C (93.0 F)
2017	35.6 C (96.1 F)
2018	34.4 C (93.9 F)
2019	33.3 C (91.9 F)
2020	35.6 C (96.1 F)
2021	37.2 C (99.0 F)
2022	36.7 C (98.1 F)
2023	35.0 C (95.0 F)
2024	37.8 C (100.0 F)
2025	34.4 C (93.9 F)
2026	41.1 C (106.0 F)

Coldest night (TNn)

The coldest night of the year at Ryegate 18 NNW, 1962 to 2026. The record is -42.2 C (-44.0 F) in 2024, marked on the chart; the median year is -32.8 C (-27.0 F).

Coldest night (TNn) at Ryegate 18 NNW by year
Year	Coldest night (TNn)
1962	-27.2 C (-17.0 F)
1963	-36.1 C (-33.0 F)
1964	-36.1 C (-33.0 F)
1965	-31.7 C (-25.1 F)
1966	-37.2 C (-35.0 F)
1967	-31.7 C (-25.1 F)
1968	-41.1 C (-42.0 F)
1969	-37.2 C (-35.0 F)
1970	-27.8 C (-18.0 F)
1971	-33.3 C (-27.9 F)
1972	-37.2 C (-35.0 F)
1973	-32.8 C (-27.0 F)
1974	-33.9 C (-29.0 F)
1975	-32.8 C (-27.0 F)
1976	-31.7 C (-25.1 F)
1977	-30.0 C (-22.0 F)
1978	-34.4 C (-29.9 F)
1979	-33.3 C (-27.9 F)
1980	-32.2 C (-26.0 F)
1981	-29.4 C (-20.9 F)
1982	-36.7 C (-34.1 F)
1983	-38.3 C (-36.9 F)
1984	-31.1 C (-24.0 F)
1985	-33.9 C (-29.0 F)
1986	-32.2 C (-26.0 F)
1987	-26.7 C (-16.1 F)
1988	-30.0 C (-22.0 F)
1989	-40.6 C (-41.1 F)
1990	-37.2 C (-35.0 F)
1991	-29.4 C (-20.9 F)
1992	-31.7 C (-25.1 F)
1993	-31.7 C (-25.1 F)
1994	-37.8 C (-36.0 F)
1995	-30.6 C (-23.1 F)
1996	-38.9 C (-38.0 F)
1997	-37.2 C (-35.0 F)
1998	-34.4 C (-29.9 F)
1999	-26.7 C (-16.1 F)
2000	-32.8 C (-27.0 F)
2001	-27.8 C (-18.0 F)
2002	-27.8 C (-18.0 F)
2003	-32.8 C (-27.0 F)
2004	-31.7 C (-25.1 F)
2005	-32.8 C (-27.0 F)
2006	-28.9 C (-20.0 F)
2007	-26.7 C (-16.1 F)
2008	-32.8 C (-27.0 F)
2009	-29.4 C (-20.9 F)
2010	-33.3 C (-27.9 F)
2011	-31.7 C (-25.1 F)
2012	-25.6 C (-14.1 F)
2013	-33.3 C (-27.9 F)
2014	-33.9 C (-29.0 F)
2015	-25.6 C (-14.1 F)
2016	-35.0 C (-31.0 F)
2017	-28.9 C (-20.0 F)
2018	-31.7 C (-25.1 F)
2019	-35.6 C (-32.1 F)
2020	-29.4 C (-20.9 F)
2021	-40.0 C (-40.0 F)
2022	-38.3 C (-36.9 F)
2023	-31.1 C (-24.0 F)
2024	-42.2 C (-44.0 F)
2025	-32.2 C (-26.0 F)
2026	-26.1 C (-15.0 F)

Wettest day (Rx1day)

The wettest day of the year at Ryegate 18 NNW, 1962 to 2026. The record is 70.6 mm (2.8 in) in 2013, marked on the chart; the median year is 30.7 mm (1.2 in).

Wettest day (Rx1day) at Ryegate 18 NNW by year
Year	Wettest day (Rx1day)
1962	15.2 mm (0.6 in)
1963	27.2 mm (1.1 in)
1964	58.9 mm (2.3 in)
1965	54.4 mm (2.1 in)
1966	24.9 mm (1.0 in)
1967	48.0 mm (1.9 in)
1968	32.3 mm (1.3 in)
1969	35.6 mm (1.4 in)
1970	30.7 mm (1.2 in)
1971	31.8 mm (1.3 in)
1972	22.1 mm (0.9 in)
1973	35.6 mm (1.4 in)
1974	32.0 mm (1.3 in)
1975	50.8 mm (2.0 in)
1976	31.0 mm (1.2 in)
1977	26.7 mm (1.1 in)
1978	31.8 mm (1.3 in)
1979	33.0 mm (1.3 in)
1980	38.6 mm (1.5 in)
1981	22.9 mm (0.9 in)
1982	31.0 mm (1.2 in)
1983	33.5 mm (1.3 in)
1984	22.9 mm (0.9 in)
1985	25.4 mm (1.0 in)
1986	48.8 mm (1.9 in)
1987	33.0 mm (1.3 in)
1988	35.1 mm (1.4 in)
1989	21.6 mm (0.9 in)
1990	57.2 mm (2.3 in)
1991	27.9 mm (1.1 in)
1992	44.5 mm (1.8 in)
1993	33.0 mm (1.3 in)
1994	19.1 mm (0.8 in)
1995	40.6 mm (1.6 in)
1996	19.1 mm (0.8 in)
1997	33.5 mm (1.3 in)
1998	23.6 mm (0.9 in)
1999	22.1 mm (0.9 in)
2000	16.5 mm (0.6 in)
2001	23.6 mm (0.9 in)
2002	25.4 mm (1.0 in)
2003	23.1 mm (0.9 in)
2004	26.7 mm (1.1 in)
2005	16.0 mm (0.6 in)
2006	20.3 mm (0.8 in)
2007	20.8 mm (0.8 in)
2008	26.9 mm (1.1 in)
2009	31.2 mm (1.2 in)
2010	23.6 mm (0.9 in)
2011	47.5 mm (1.9 in)
2012	22.1 mm (0.9 in)
2013	70.6 mm (2.8 in)
2014	42.4 mm (1.7 in)
2015	26.2 mm (1.0 in)
2016	29.2 mm (1.1 in)
2017	37.6 mm (1.5 in)
2018	40.6 mm (1.6 in)
2019	27.9 mm (1.1 in)
2020	34.3 mm (1.4 in)
2021	27.9 mm (1.1 in)
2022	22.9 mm (0.9 in)
2023	62.2 mm (2.4 in)
2024	40.6 mm (1.6 in)
2025	30.5 mm (1.2 in)
2026	27.9 mm (1.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Ryegate 18 NNW, 1962 to 2026. The record is 97.9 mm (3.9 in) in 1992, marked on the chart; the median year is 42.0 mm (1.7 in).

Wettest five days (Rx5day) at Ryegate 18 NNW by year
Year	Wettest five days (Rx5day)
1962	26.1 mm (1.0 in)
1963	42.0 mm (1.7 in)
1964	64.2 mm (2.5 in)
1965	64.6 mm (2.5 in)
1966	30.7 mm (1.2 in)
1967	66.0 mm (2.6 in)
1968	52.4 mm (2.1 in)
1969	50.9 mm (2.0 in)
1970	60.9 mm (2.4 in)
1971	57.2 mm (2.3 in)
1972	50.7 mm (2.0 in)
1973	38.4 mm (1.5 in)
1974	54.6 mm (2.1 in)
1975	52.3 mm (2.1 in)
1976	53.4 mm (2.1 in)
1977	41.1 mm (1.6 in)
1978	52.1 mm (2.1 in)
1979	39.3 mm (1.5 in)
1980	43.7 mm (1.7 in)
1981	32.1 mm (1.3 in)
1982	38.8 mm (1.5 in)
1983	36.0 mm (1.4 in)
1984	23.4 mm (0.9 in)
1985	47.0 mm (1.9 in)
1986	60.7 mm (2.4 in)
1987	40.1 mm (1.6 in)
1988	35.1 mm (1.4 in)
1989	53.6 mm (2.1 in)
1990	82.7 mm (3.3 in)
1991	51.3 mm (2.0 in)
1992	97.9 mm (3.9 in)
1993	41.9 mm (1.6 in)
1994	31.0 mm (1.2 in)
1995	49.5 mm (1.9 in)
1996	30.4 mm (1.2 in)
1997	61.5 mm (2.4 in)
1998	41.1 mm (1.6 in)
1999	35.3 mm (1.4 in)
2000	17.3 mm (0.7 in)
2001	27.9 mm (1.1 in)
2002	42.0 mm (1.7 in)
2003	25.9 mm (1.0 in)
2004	41.6 mm (1.6 in)
2005	34.3 mm (1.4 in)
2006	39.9 mm (1.6 in)
2007	38.6 mm (1.5 in)
2008	71.7 mm (2.8 in)
2009	41.4 mm (1.6 in)
2010	39.2 mm (1.5 in)
2011	84.3 mm (3.3 in)
2012	30.2 mm (1.2 in)
2013	80.7 mm (3.2 in)
2014	87.4 mm (3.4 in)
2015	51.7 mm (2.0 in)
2016	36.4 mm (1.4 in)
2017	38.9 mm (1.5 in)
2018	71.2 mm (2.8 in)
2019	40.7 mm (1.6 in)
2020	54.7 mm (2.2 in)
2021	41.9 mm (1.6 in)
2022	35.6 mm (1.4 in)
2023	87.6 mm (3.4 in)
2024	50.8 mm (2.0 in)
2025	49.6 mm (2.0 in)
2026	34.2 mm (1.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at Ryegate 18 NNW, 1962 to 2026. The record is 75 days in 1987, marked on the chart; the median year is 36 days.

Longest dry spell (CDD) at Ryegate 18 NNW by year
Year	Longest dry spell (CDD)
1962	36 days
1963	62 days
1964	51 days
1965	36 days
1966	35 days
1967	37 days
1968	39 days
1969	38 days
1970	33 days
1971	29 days
1972	33 days
1973	58 days
1974	39 days
1975	25 days
1976	48 days
1977	40 days
1978	50 days
1979	35 days
1980	36 days
1981	34 days
1982	22 days
1983	29 days
1984	26 days
1985	35 days
1986	33 days
1987	75 days
1988	56 days
1989	17 days
1990	38 days
1991	40 days
1992	58 days
1993	25 days
1994	26 days
1995	16 days
1996	39 days
1997	43 days
1998	41 days
1999	46 days
2000	31 days
2001	37 days
2002	34 days
2003	25 days
2004	62 days
2005	38 days
2006	33 days
2007	27 days
2008	34 days
2009	29 days
2010	36 days
2011	30 days
2012	41 days
2013	39 days
2014	41 days
2015	64 days
2016	28 days
2017	39 days
2018	38 days
2019	19 days
2020	36 days
2021	48 days
2022	28 days
2023	30 days
2024	28 days
2025	39 days
2026	39 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

60 years with a frost

Across 60 years with a frost, the median last spring frost at Ryegate 18 NNW falls on 30 May and the median first autumn frost on 14 September, which leaves a median of 107 days between them.

In 1995 to 2025 the median growing season was 114 days. That is 12 days more than in 1963 to 1994.

Fitted over all years, the growing season changes by +4.9 days per decade at this station.

Frost dates and growing season at Ryegate 18 NNW
Measure	Median, all years	Earliest period (1963 to 1994)	Recent period (1995 to 2025)	Recent against earliest	Fitted trend
Last spring frost	30 May	3 June	27 May	7 days earlier	-2.3 days per decade
First autumn frost	14 September	12 September	18 September	6 days later	+2.6 days per decade
Growing days	107 days	102 days	114 days	12 days more	+4.9 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

62 years, 1963 to 2025

A day with at least 29.7 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 73.6 mm (2.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Ryegate 18 NNW: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	29.7 mm (1.2 in)
5 years	39.5 mm (1.6 in)
10 years	46.7 mm (1.8 in)
25 years	56.7 mm (2.2 in)
50 years	64.8 mm (2.6 in)
100 years	73.6 mm (2.9 in)	Longer than the 62 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 62 years of values from 1963 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: 70.6 mm (2.8 in) in 2013; 62.2 mm (2.4 in) in 2023; 58.9 mm (2.3 in) in 1964.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Climate Twins

2011 to 2025 against 1961 to 1990

Over 2011 to 2025, Ryegate 18 NNW had a mean temperature of 6.4 C (43.5 F) and 395.5 mm (15.6 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Seminoe Dam (United States, 523 km away), Grace (United States, 481 km away) and Kamas (United States, 673 km away).

Climate twins of Ryegate 18 NNW: stations whose 1961 to 1990 climate is closest to its 2011 to 2025 climate
Twin station	Country	Distance away	Mean temperature, 1961-1990	Rain a year, 1961-1990	Climate difference
Seminoe Dam	United States	523 km (325 mi)	6.5 C (43.6 F)	331.3 mm (13.0 in)	1.15
Grace	United States	481 km (299 mi)	6.1 C (43.0 F)	390.6 mm (15.4 in)	1.16
Kamas	United States	673 km (418 mi)	6.5 C (43.7 F)	404.4 mm (15.9 in)	1.16

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

Data for Ryegate 18 NNW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ryegate 18 NNW threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-12 (12 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-13. Last revised 13 October 2026 (2026-10-13).