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Built 2026-10-17 (17 October 2026)

Bitter Lakes Wl Refuge Threshold Days by Year

20 fixed thresholds counted per year at Bitter Lakes Wl Refuge (USC00290992): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Bitter Lakes Wl Refuge Thresholds

  • Bitter Lakes Wl Refuge: days with 10 mm (0.39 in) or more of precipitation in 65 years, most in 1978 with 19.
  • Bitter Lakes Wl Refuge: days with 25 mm (0.98 in) or more of precipitation in 57 years, most in 2007 with 8.
  • Bitter Lakes Wl Refuge: nights with a minimum temperature at or below 0 C (32 F) in 44 years, most in 1975 with 157.
  • Bitter Lakes Wl Refuge: nights with a minimum temperature at or below -10 C (14 F) in 44 years, most in 2011 with 41.
  • 20 fixed thresholds have at least one qualifying day at Bitter Lakes Wl Refuge.
40 years with a qualifying day
Days at or above 30 C (86 F) per year at Bitter Lakes Wl Refuge Days per year at Bitter Lakes Wl Refuge with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 175 in 1963. 0501001502001951: 1551952: 1401953: 1441954: 1581956: 1711957: 1371958: 1351959: 1541960: 1571961: 1541962: 1611963: 1751964: 1501969: 1261973: 1321974: 1271975: 1211976: 1141977: 1401978: 1291979: 1331980: 1281981: 1221982: 1341983: 1281990: 1351991: 1171992: 1221993: 1472001: 1442003: 1502004: 1282006: 1422007: 1392008: 1252009: 1412010: 1272011: 1532014: 1282015: 1351951195619601964197519791983199320062010
Days per year at Bitter Lakes Wl Refuge with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 175 in 1963.
Days at or above 30 C (86 F) per year at Bitter Lakes Wl Refuge
YearDaysDecade average
1951155149.3
1952140149.3
1953144149.3
1954158149.3
1956171149.3
1957137149.3
1958135149.3
1959154149.3
1960157153.8
1961154153.8
1962161153.8
1963175153.8
1964150153.8
1969126153.8
1973132128
1974127128
1975121128
1976114128
1977140128
1978129128
1979133128
1980128128
1981122128
1982134128
1983128128
1990135130.3
1991117130.3
1992122130.3
1993147130.3
2001144138.4
2003150138.4
2004128138.4
2006142138.4
2007139138.4
2008125138.4
2009141138.4
2010127135.8
2011153135.8
2014128135.8
2015135135.8
First to last qualifying date each year at Bitter Lakes Wl Refuge For each year, a bar from the first to the last day at Bitter Lakes Wl Refuge meeting 30 C (86 F). 1951: 14 April 1951 to 16 October 19511952: 7 April 1952 to 30 October 19521953: 26 March 1953 to 16 October 19531954: 10 March 1954 to 13 October 19541956: 5 March 1956 to 21 October 19561957: 9 February 1957 to 5 October 19571958: 21 April 1958 to 19 October 19581959: 2 April 1959 to 26 October 19591960: 8 March 1960 to 12 October 19601961: 4 April 1961 to 22 October 19611962: 27 March 1962 to 15 October 19621963: 27 March 1963 to 16 November 19631964: 16 April 1964 to 17 October 19641969: 2 April 1969 to 19 October 19691973: 29 April 1973 to 8 November 19731974: 3 March 1974 to 5 October 19741975: 18 April 1975 to 28 October 19751976: 19 March 1976 to 12 October 19761977: 9 April 1977 to 1 October 19771978: 23 March 1978 to 13 October 19781979: 15 February 1979 to 27 October 19791980: 11 April 1980 to 9 November 19801981: 3 April 1981 to 21 October 19811982: 19 March 1982 to 19 October 19821983: 1 April 1983 to 7 October 19831990: 22 March 1990 to 20 October 19901991: 8 April 1991 to 18 October 19911992: 11 April 1992 to 16 October 19921993: 6 April 1993 to 16 October 19932001: 2 April 2001 to 1 November 20012003: 13 March 2003 to 30 October 20032004: 18 March 2004 to 16 October 20042006: 1 March 2006 to 10 November 20062007: 16 March 2007 to 9 November 20072008: 21 March 2008 to 14 October 20082009: 22 March 2009 to 15 October 20092010: 31 March 2010 to 9 November 20102011: 16 February 2011 to 26 October 20112014: 9 April 2014 to 27 October 20142015: 28 March 2015 to 15 October 201519511957196219741979199020032009JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Bitter Lakes Wl Refuge meeting 30 C (86 F).
First to last qualifying date each year at Bitter Lakes Wl Refuge
YearFirst dateLast date
19511951-04-141951-10-16
19521952-04-071952-10-30
19531953-03-261953-10-16
19541954-03-101954-10-13
19561956-03-051956-10-21
19571957-02-091957-10-05
19581958-04-211958-10-19
19591959-04-021959-10-26
19601960-03-081960-10-12
19611961-04-041961-10-22
19621962-03-271962-10-15
19631963-03-271963-11-16
19641964-04-161964-10-17
19691969-04-021969-10-19
19731973-04-291973-11-08
19741974-03-031974-10-05
19751975-04-181975-10-28
19761976-03-191976-10-12
19771977-04-091977-10-01
19781978-03-231978-10-13
19791979-02-151979-10-27
19801980-04-111980-11-09
19811981-04-031981-10-21
19821982-03-191982-10-19
19831983-04-011983-10-07
19901990-03-221990-10-20
19911991-04-081991-10-18
19921992-04-111992-10-16
19931993-04-061993-10-16
20012001-04-022001-11-01
20032003-03-132003-10-30
20042004-03-182004-10-16
20062006-03-012006-11-10
20072007-03-162007-11-09
20082008-03-212008-10-14
20092009-03-222009-10-15
20102010-03-312010-11-09
20112011-02-162011-10-26
20142014-04-092014-10-27
20152015-03-282015-10-15

Every Fixed Threshold

Fixed thresholds at Bitter Lakes Wl Refuge
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days401751963135
35 C (95 F): Days4094195167
40 C (104 F): Days392719805
45 C (113 F): Days1119811
90 F (32.2 C): Days401461956102
100 F (37.8 C): Days4056198023
110 F (43.3 C): Days6319812
0 C (32 F): Ice days (max3212198210
0 C (32 F): Frost days (min441571975127
-10 C (14 F): Days with min444120117
-20 C (-4 F): Days with min15319632
-30 C (-22 F): Days with min2119621
20 C (68 F): Tropical nights (min413020014
25 C (77 F): Days with min1119691
10 mm (0.39 in): Days with 10 mm or more rain651919785
25 mm (0.98 in): Days with 25 mm or more rain57820073
50 mm (1.97 in): Days with 50 mm or more rain26219601
100 mm (3.94 in): Days with 100 mm or more rain4120041
10 cm (3.9 in): Days with 10 cm or more snowfall21419821
25 cm (9.8 in): Days with 25 cm or more snowfall3119601

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1951.

Download the Data

  • Data for Bitter Lakes Wl Refuge 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).