Record envelope, standing records and threshold days for San Haven (USC00327824), North Dakota, United States, with 36 years of record.
Key Facts for San Haven
San Haven (USC00327824) is a weather station in North Dakota, United States at 48.83 latitude and -100.03 longitude, 586 m (1,923 ft) above sea level.
The station reports from 1951 to 1986, 36 years of record.
1,464 records set at San Haven still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
San Haven tied a daily record high maximum temperature of 7.2 C (45.0 F) on 27 February 1986.
About the Station
Location: North Dakota, United States, 48.83 latitude, -100.03 longitude.
Elevation: 586 m (1,923 ft).
Period of record: 1951 to 1986, 36 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at San Haven. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at San Haven, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
10.0 C (50.0 F)
-40.0 C (-40.0 F)
n/a
n/a
Feb
11.7 C (53.1 F)
-36.1 C (-33.0 F)
n/a
n/a
Mar
21.7 C (71.1 F)
-36.1 C (-33.0 F)
n/a
n/a
Apr
34.4 C (93.9 F)
-25.6 C (-14.1 F)
n/a
n/a
May
36.1 C (97.0 F)
-10.6 C (12.9 F)
n/a
n/a
Jun
37.8 C (100.0 F)
-1.1 C (30.0 F)
n/a
n/a
Jul
37.2 C (99.0 F)
1.7 C (35.1 F)
n/a
n/a
Aug
37.2 C (99.0 F)
-2.8 C (27.0 F)
n/a
n/a
Sep
36.7 C (98.1 F)
-7.8 C (18.0 F)
n/a
n/a
Oct
31.7 C (89.1 F)
-17.8 C (0.0 F)
n/a
n/a
Nov
21.1 C (70.0 F)
-33.9 C (-29.0 F)
n/a
n/a
Dec
13.3 C (55.9 F)
-41.7 C (-43.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at San Haven still stand. 1983 holds the most, with 61.
Standing records at San Haven by the year they were set
Year set
Standing records
1951
15
1952
53
1953
51
1954
57
1955
41
1956
32
1957
37
1958
49
1959
57
1960
25
1961
41
1962
46
1963
57
1964
46
1965
36
1966
50
1967
41
1968
45
1969
38
1970
29
1971
19
1972
53
1973
30
1974
35
1975
28
1976
34
1977
55
1978
30
1979
46
1980
43
1981
47
1982
37
1983
61
1984
48
1985
46
1986
6
All-Time Record Progression
2 new records
2 all-time records were set at San Haven between 24 December 1983 and 19 November 1985. Each dot is a new record.
When San Haven set new all-time records
Date
Kind
Detail
1983-12-24
Record low maximum temperature
Record low maximum temperature -32.2 C (-26.0 F)
1985-11-19
Record daily snowfall
Record daily snowfall 30.5 cm (12.0 in)
Wettest Day of Each Month
Jul: 79.8 mm (3.1 in)
The wettest day on record for each calendar month at San Haven. The most was 79.8 mm (3.1 in) on 21 July 1965.
Record daily precipitation for each month at San Haven
Month
Record daily precipitation (mm)
Date
Jan
9.7 mm (0.38 in)
25 January 1981
Feb
27.9 mm (1.1 in)
12 February 1985
Mar
26.7 mm (1.1 in)
22 March 1985
Apr
49.0 mm (1.9 in)
27 April 1984
May
45.7 mm (1.8 in)
28 May 1953
Jun
52.8 mm (2.1 in)
8 June 1954
Jul
79.8 mm (3.1 in)
21 July 1965
Aug
70.1 mm (2.8 in)
12 August 1957
Sep
54.6 mm (2.1 in)
12 September 1980
Oct
37.6 mm (1.5 in)
10 October 1969
Nov
17.3 mm (0.7 in)
17 November 1958
Dec
17.8 mm (0.7 in)
17 December 1977
Period of Record Coverage
1951 to 1986
Complete yearUnder 90 percent of days
36 years of record at San Haven, 1951 to 1986. 2 years have data for under 90 percent of days and are left out of rankings: 1951, 1986.
Cooler than the station meanWarmer than the station mean
One stripe for each of 32 complete years at San Haven, 1952 to 1985. Blue stripes are years cooler than the station's own mean of 3.0 C (37.5 F); red stripes are warmer. The coolest year was 1982, at 0.7 C (33.2 F), and the warmest was 1953, at 5.0 C (40.9 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at San Haven as warming stripes, 1952 to 1985
Year
Annual mean temperature
Difference from the station mean
1952
4.6 C
+1.59 C
1953
5.0 C
+1.92 C
1954
4.1 C
+1.02 C
1955
2.9 C
-0.15 C
1956
3.2 C
+0.19 C
1957
3.6 C
+0.58 C
1958
4.1 C
+1.03 C
1959
3.2 C
+0.18 C
1960
3.5 C
+0.43 C
1961
4.4 C
+1.39 C
1962
3.5 C
+0.48 C
1963
4.8 C
+1.79 C
1964
3.5 C
+0.45 C
1965
2.6 C
-0.45 C
1966
2.4 C
-0.60 C
1967
3.0 C
-0.06 C
1968
3.2 C
+0.21 C
1969
3.2 C
+0.17 C
1970
2.7 C
-0.34 C
1971
3.0 C
+0.01 C
1972
1.7 C
-1.31 C
1973
3.6 C
+0.52 C
1975
2.4 C
-0.61 C
1976
2.7 C
-0.30 C
1977
2.9 C
-0.16 C
1978
1.9 C
-1.10 C
1979
1.1 C
-1.91 C
1980
2.9 C
-0.11 C
1982
0.7 C
-2.35 C
1983
2.2 C
-0.81 C
1984
2.9 C
-0.17 C
1985
1.5 C
-1.51 C
The annual mean temperature here has fallen by 0.7 C (0.5 to 1.0) per decade over 1952 to 1985. In Fahrenheit: 1.3 F (0.9 to 1.8) per decade. The slope is a straight line fitted to 32 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at San Haven
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.7 C (-1.0 to -0.5) per decade
-1.3 F (-1.8 to -0.9) per decade
1952 to 1985
32
Fall
Mean daily maximum
-0.5 C (-0.8 to -0.2) per decade
-0.9 F (-1.4 to -0.3) per decade
1952 to 1985
32
Fall
Mean daily minimum
-1.0 C (-1.3 to -0.8) per decade
-1.8 F (-2.3 to -1.4) per decade
1952 to 1985
32
Fall
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
1951 to 1986
Yearly extremes at San Haven: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
37.8 C (100.0 F)
1973
35.3 C (95.5 F)
36
Coldest night (TNn)
-41.7 C (-43.1 F)
1967
-35.0 C (-31.0 F)
36
Wettest day (Rx1day)
79.8 mm (3.1 in)
1965
41.4 mm (1.6 in)
35
Wettest five days (Rx5day)
127.6 mm (5.0 in)
1965
55.1 mm (2.2 in)
35
Longest dry spell (CDD)
91 days
1981
32 days
35
Hottest day (TXx)
The hottest day of the year at San Haven, 1951 to 1986. The record is 37.8 C (100.0 F) in 1973, marked on the chart; the median year is 35.3 C (95.5 F).
Hottest day (TXx) at San Haven by year
Year
Hottest day (TXx)
1951
23.3 C (73.9 F)
1952
34.4 C (93.9 F)
1953
33.9 C (93.0 F)
1954
34.4 C (93.9 F)
1955
35.0 C (95.0 F)
1956
34.4 C (93.9 F)
1957
36.1 C (97.0 F)
1958
36.1 C (97.0 F)
1959
36.7 C (98.1 F)
1960
37.2 C (99.0 F)
1961
36.1 C (97.0 F)
1962
32.2 C (90.0 F)
1963
35.6 C (96.1 F)
1964
35.6 C (96.1 F)
1965
32.8 C (91.0 F)
1966
33.3 C (91.9 F)
1967
36.1 C (97.0 F)
1968
35.0 C (95.0 F)
1969
35.6 C (96.1 F)
1970
35.0 C (95.0 F)
1971
35.6 C (96.1 F)
1972
35.0 C (95.0 F)
1973
37.8 C (100.0 F)
1974
34.4 C (93.9 F)
1975
35.6 C (96.1 F)
1976
36.7 C (98.1 F)
1977
34.4 C (93.9 F)
1978
35.6 C (96.1 F)
1979
35.0 C (95.0 F)
1980
36.1 C (97.0 F)
1981
37.2 C (99.0 F)
1982
33.3 C (91.9 F)
1983
36.7 C (98.1 F)
1984
36.1 C (97.0 F)
1985
32.8 C (91.0 F)
1986
10.0 C (50.0 F)
Coldest night (TNn)
The coldest night of the year at San Haven, 1951 to 1986. The record is -41.7 C (-43.1 F) in 1967, marked on the chart; the median year is -35.0 C (-31.0 F).
Coldest night (TNn) at San Haven by year
Year
Coldest night (TNn)
1951
-33.9 C (-29.0 F)
1952
-35.0 C (-31.0 F)
1953
-32.8 C (-27.0 F)
1954
-37.2 C (-35.0 F)
1955
-34.4 C (-29.9 F)
1956
-32.8 C (-27.0 F)
1957
-34.4 C (-29.9 F)
1958
-32.8 C (-27.0 F)
1959
-34.4 C (-29.9 F)
1960
-35.0 C (-31.0 F)
1961
-36.7 C (-34.1 F)
1962
-37.2 C (-35.0 F)
1963
-35.0 C (-31.0 F)
1964
-30.6 C (-23.1 F)
1965
-33.9 C (-29.0 F)
1966
-40.0 C (-40.0 F)
1967
-41.7 C (-43.1 F)
1968
-40.0 C (-40.0 F)
1969
-32.2 C (-26.0 F)
1970
-36.1 C (-33.0 F)
1971
-32.8 C (-27.0 F)
1972
-38.3 C (-36.9 F)
1973
-33.3 C (-27.9 F)
1974
-39.4 C (-38.9 F)
1975
-33.3 C (-27.9 F)
1976
-34.4 C (-29.9 F)
1977
-37.2 C (-35.0 F)
1978
-34.4 C (-29.9 F)
1979
-35.6 C (-32.1 F)
1980
-37.2 C (-35.0 F)
1981
-35.6 C (-32.1 F)
1982
-36.7 C (-34.1 F)
1983
-41.1 C (-42.0 F)
1984
-36.7 C (-34.1 F)
1985
-37.2 C (-35.0 F)
1986
-33.9 C (-29.0 F)
Wettest day (Rx1day)
The wettest day of the year at San Haven, 1951 to 1986. The record is 79.8 mm (3.1 in) in 1965, marked on the chart; the median year is 41.4 mm (1.6 in).
Wettest day (Rx1day) at San Haven by year
Year
Wettest day (Rx1day)
1951
31.0 mm (1.2 in)
1952
42.7 mm (1.7 in)
1953
45.7 mm (1.8 in)
1954
52.8 mm (2.1 in)
1955
31.0 mm (1.2 in)
1956
36.1 mm (1.4 in)
1957
70.1 mm (2.8 in)
1958
21.1 mm (0.8 in)
1959
70.1 mm (2.8 in)
1960
43.2 mm (1.7 in)
1961
19.3 mm (0.8 in)
1962
48.5 mm (1.9 in)
1963
26.2 mm (1.0 in)
1964
47.8 mm (1.9 in)
1965
79.8 mm (3.1 in)
1966
34.3 mm (1.4 in)
1967
37.6 mm (1.5 in)
1968
46.5 mm (1.8 in)
1969
37.6 mm (1.5 in)
1970
43.7 mm (1.7 in)
1971
55.1 mm (2.2 in)
1972
22.9 mm (0.9 in)
1973
50.8 mm (2.0 in)
1974
34.3 mm (1.4 in)
1975
34.3 mm (1.4 in)
1976
20.3 mm (0.8 in)
1977
76.7 mm (3.0 in)
1978
38.1 mm (1.5 in)
1979
32.5 mm (1.3 in)
1980
63.5 mm (2.5 in)
1981
21.6 mm (0.9 in)
1982
48.8 mm (1.9 in)
1983
41.4 mm (1.6 in)
1984
49.0 mm (1.9 in)
1985
27.9 mm (1.1 in)
1986
n/a
Wettest five days (Rx5day)
The wettest five days of the year at San Haven, 1951 to 1986. The record is 127.6 mm (5.0 in) in 1965, marked on the chart; the median year is 55.1 mm (2.2 in).
Wettest five days (Rx5day) at San Haven by year
Year
Wettest five days (Rx5day)
1951
31.8 mm (1.3 in)
1952
46.3 mm (1.8 in)
1953
72.4 mm (2.9 in)
1954
126.7 mm (5.0 in)
1955
55.1 mm (2.2 in)
1956
51.4 mm (2.0 in)
1957
95.4 mm (3.8 in)
1958
48.3 mm (1.9 in)
1959
107.7 mm (4.2 in)
1960
78.5 mm (3.1 in)
1961
43.3 mm (1.7 in)
1962
69.1 mm (2.7 in)
1963
49.3 mm (1.9 in)
1964
92.5 mm (3.6 in)
1965
127.6 mm (5.0 in)
1966
68.6 mm (2.7 in)
1967
38.6 mm (1.5 in)
1968
65.2 mm (2.6 in)
1969
49.7 mm (2.0 in)
1970
45.7 mm (1.8 in)
1971
61.2 mm (2.4 in)
1972
32.5 mm (1.3 in)
1973
86.6 mm (3.4 in)
1974
36.8 mm (1.4 in)
1975
50.9 mm (2.0 in)
1976
29.7 mm (1.2 in)
1977
87.6 mm (3.4 in)
1978
77.5 mm (3.1 in)
1979
39.4 mm (1.6 in)
1980
89.4 mm (3.5 in)
1981
43.0 mm (1.7 in)
1982
59.5 mm (2.3 in)
1983
49.0 mm (1.9 in)
1984
93.4 mm (3.7 in)
1985
50.9 mm (2.0 in)
1986
n/a
Longest dry spell (CDD)
The longest dry spell of the year at San Haven, 1951 to 1986. The record is 91 days in 1981, marked on the chart; the median year is 32 days.
Longest dry spell (CDD) at San Haven by year
Year
Longest dry spell (CDD)
1951
20 days
1952
49 days
1953
28 days
1954
31 days
1955
21 days
1956
26 days
1957
32 days
1958
72 days
1959
53 days
1960
65 days
1961
86 days
1962
27 days
1963
46 days
1964
21 days
1965
64 days
1966
32 days
1967
23 days
1968
44 days
1969
51 days
1970
29 days
1971
41 days
1972
28 days
1973
43 days
1974
52 days
1975
28 days
1976
59 days
1977
47 days
1978
37 days
1979
28 days
1980
50 days
1981
91 days
1982
27 days
1983
25 days
1984
21 days
1985
20 days
1986
n/a
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
32 years with a frost
Across 32 years with a frost, the median last spring frost at San Haven falls on 22 May and the median first autumn frost on 18 September, which leaves a median of 120 days between them.
Fitted over all years, the growing season changes by -6.3 days per decade at this station.
Frost dates and growing season at San Haven
Measure
Median, all years
Earliest period
Recent period (1954 to 1985)
Recent against earliest
Fitted trend
Last spring frost
22 May
n/a
22 May
n/a
+4.5 days per decade
First autumn frost
18 September
n/a
16 September
n/a
-1.8 days per decade
Growing days
120 days
n/a
120 days
n/a
-6.3 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
33 years, 1952 to 1984
A day with at least 41.1 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 89.7 mm (3.5 in) of rain is expected about once in 100 years.
Rainfall return levels at San Haven: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
41.1 mm (1.6 in)
5 years
55.8 mm (2.2 in)
10 years
64.8 mm (2.6 in)
25 years
75.4 mm (3.0 in)
50 years
82.8 mm (3.3 in)
Longer than the 33 years of record
100 years
89.7 mm (3.5 in)
Longer than the 33 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, 33 years of values from 1952 to 1984.
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: 79.8 mm (3.1 in) in 1965; 76.7 mm (3.0 in) in 1977; 70.1 mm (2.8 in) in 1957.
Download the Data
Data for San Haven standing records by year: CSV or JSON. Field meanings are on the data page.
Data for San Haven 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.