Record envelope, standing records and threshold days for Ona (NOE00109719), Norway, with 53 years of record.
Key Facts for Ona
Ona (NOE00109719) is a weather station in Norway at 62.87 latitude and 6.55 longitude, 11 m (36 ft) above sea level.
The station reports from 1911 to 1963, 53 years of record.
1,464 records set at Ona still stand.
Records are tracked for tmin, prcp: an element needs 30 years of data to be eligible.
Ona set a daily record low minimum temperature of -6.5 C (20.3 F) on 16 January 1963.
About the Station
Location: Norway, 62.87 latitude, 6.55 longitude.
Elevation: 11 m (36 ft).
Period of record: 1911 to 1963, 53 years.
Eligible elements: tmin, prcp.
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 Ona. 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 Ona, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
11.4 C (52.5 F)
-8.2 C (17.2 F)
n/a
n/a
Feb
10.4 C (50.7 F)
-11.0 C (12.2 F)
n/a
n/a
Mar
14.5 C (58.1 F)
-6.8 C (19.8 F)
n/a
n/a
Apr
17.5 C (63.5 F)
-6.1 C (21.0 F)
n/a
n/a
May
23.1 C (73.6 F)
-1.2 C (29.8 F)
n/a
n/a
Jun
24.0 C (75.2 F)
1.6 C (34.9 F)
n/a
n/a
Jul
25.6 C (78.1 F)
6.5 C (43.7 F)
n/a
n/a
Aug
24.9 C (76.8 F)
0.4 C (32.7 F)
n/a
n/a
Sep
22.0 C (71.6 F)
1.2 C (34.2 F)
n/a
n/a
Oct
18.3 C (64.9 F)
-1.9 C (28.6 F)
n/a
n/a
Nov
13.6 C (56.5 F)
-3.6 C (25.5 F)
n/a
n/a
Dec
14.3 C (57.7 F)
-10.5 C (13.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Ona still stand. 1947 holds the most, with 74.
Standing records at Ona by the year they were set
Year set
Standing records
1911
16
1912
16
1913
22
1914
19
1915
22
1916
7
1917
20
1918
21
1919
24
1920
7
1921
27
1922
3
1923
19
1924
8
1925
31
1926
16
1927
15
1928
16
1929
14
1930
19
1931
47
1932
31
1933
38
1934
58
1935
34
1936
36
1943
31
1944
26
1945
36
1946
23
1947
74
1948
49
1949
46
1950
44
1951
31
1952
47
1953
56
1954
24
1955
70
1956
38
1957
38
1958
42
1959
41
1960
50
1961
63
1962
44
1963
5
All-Time Record Progression
1 new records
1 all-time records were set at Ona between 8 February 1953 and 8 February 1953. Each dot is a new record.
When Ona set new all-time records
Date
Kind
Detail
1953-02-08
Record low minimum temperature
Record low minimum temperature -11.0 C (12.2 F)
Wettest Day of Each Month
Jul: 70.3 mm (2.8 in)
The wettest day on record for each calendar month at Ona. The most was 70.3 mm (2.8 in) on 10 July 1921.
Record daily precipitation for each month at Ona
Month
Record daily precipitation (mm)
Date
Jan
50.1 mm (2.0 in)
7 January 1946
Feb
44.2 mm (1.7 in)
16 February 1949
Mar
68.8 mm (2.7 in)
6 March 1922
Apr
39.7 mm (1.6 in)
11 April 1926
May
30.9 mm (1.2 in)
30 May 1922
Jun
34.0 mm (1.3 in)
30 June 1946
Jul
70.3 mm (2.8 in)
10 July 1921
Aug
37.5 mm (1.5 in)
2 August 1933
Sep
67.8 mm (2.7 in)
29 September 1956
Oct
68.3 mm (2.7 in)
31 October 1921
Nov
49.8 mm (2.0 in)
24 November 1957
Dec
38.2 mm (1.5 in)
18 December 1956
Period of Record Coverage
1931 to 1963
Complete yearUnder 90 percent of days
27 years of record at Ona, 1931 to 1963. 2 years have data for under 90 percent of days and are left out of rankings: 1931, 1963.
Cooler than the station meanWarmer than the station mean
One stripe for each of 24 complete years at Ona, 1932 to 1962. Blue stripes are years cooler than the station's own mean of 7.4 C (45.3 F); red stripes are warmer. The coolest year was 1955, at 6.5 C (43.6 F), and the warmest was 1953, at 8.2 C (46.8 F). The strongest colour marks a difference of 1.0 C (1.8 F).
Annual mean temperature at Ona as warming stripes, 1932 to 1962
Year
Annual mean temperature
Difference from the station mean
1932
7.1 C
-0.23 C
1934
8.2 C
+0.83 C
1935
7.2 C
-0.19 C
1936
7.5 C
+0.16 C
1943
7.7 C
+0.32 C
1944
7.2 C
-0.15 C
1945
7.6 C
+0.19 C
1946
8.0 C
+0.60 C
1947
6.9 C
-0.48 C
1948
7.4 C
-0.01 C
1949
7.7 C
+0.28 C
1950
7.9 C
+0.54 C
1951
7.2 C
-0.17 C
1952
6.6 C
-0.82 C
1953
8.2 C
+0.84 C
1954
7.3 C
-0.09 C
1955
6.5 C
-0.92 C
1956
6.6 C
-0.77 C
1957
7.0 C
-0.34 C
1958
7.0 C
-0.38 C
1959
8.1 C
+0.69 C
1960
7.4 C
+0.01 C
1961
8.1 C
+0.68 C
1962
6.8 C
-0.59 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1911 to 1963
Yearly extremes at Ona: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
25.6 C (78.1 F)
1931
21.3 C (70.3 F)
27
Coldest night (TNn)
-11.0 C (12.2 F)
1953
-5.5 C (22.1 F)
47
Wettest day (Rx1day)
70.3 mm (2.8 in)
1921
34.3 mm (1.4 in)
41
Wettest five days (Rx5day)
124.0 mm (4.9 in)
1957
78.8 mm (3.1 in)
39
Longest dry spell (CDD)
33 days
1925
19 days
40
Hottest day (TXx)
The hottest day of the year at Ona, 1911 to 1963. The record is 25.6 C (78.1 F) in 1931, marked on the chart; the median year is 21.3 C (70.3 F).
Hottest day (TXx) at Ona by year
Year
Hottest day (TXx)
1911
n/a
1912
n/a
1913
n/a
1914
n/a
1915
n/a
1916
n/a
1917
n/a
1918
n/a
1919
n/a
1920
n/a
1921
n/a
1922
n/a
1923
n/a
1924
n/a
1925
n/a
1926
n/a
1927
n/a
1928
n/a
1929
n/a
1930
n/a
1931
25.6 C (78.1 F)
1932
20.9 C (69.6 F)
1933
23.0 C (73.4 F)
1934
23.1 C (73.6 F)
1935
21.6 C (70.9 F)
1936
21.6 C (70.9 F)
1942
n/a
1943
19.6 C (67.3 F)
1944
19.3 C (66.7 F)
1945
21.3 C (70.3 F)
1946
23.3 C (73.9 F)
1947
23.1 C (73.6 F)
1948
22.9 C (73.2 F)
1949
21.3 C (70.3 F)
1950
24.9 C (76.8 F)
1951
20.4 C (68.7 F)
1952
19.0 C (66.2 F)
1953
24.0 C (75.2 F)
1954
20.4 C (68.7 F)
1955
21.2 C (70.2 F)
1956
19.7 C (67.5 F)
1957
18.2 C (64.8 F)
1958
23.3 C (73.9 F)
1959
22.5 C (72.5 F)
1960
20.0 C (68.0 F)
1961
20.6 C (69.1 F)
1962
17.5 C (63.5 F)
1963
7.4 C (45.3 F)
Coldest night (TNn)
The coldest night of the year at Ona, 1911 to 1963. The record is -11.0 C (12.2 F) in 1953, marked on the chart; the median year is -5.5 C (22.1 F).
Coldest night (TNn) at Ona by year
Year
Coldest night (TNn)
1911
-3.9 C (25.0 F)
1912
-9.7 C (14.5 F)
1913
-6.1 C (21.0 F)
1914
-4.4 C (24.1 F)
1915
-9.2 C (15.4 F)
1916
-3.2 C (26.2 F)
1917
-5.1 C (22.8 F)
1918
-6.3 C (20.7 F)
1919
-10.5 C (13.1 F)
1920
-3.1 C (26.4 F)
1921
-7.7 C (18.1 F)
1922
-3.8 C (25.2 F)
1923
-8.4 C (16.9 F)
1924
-6.6 C (20.1 F)
1925
-5.7 C (21.7 F)
1926
-3.6 C (25.5 F)
1927
-5.5 C (22.1 F)
1928
-3.1 C (26.4 F)
1929
-6.8 C (19.8 F)
1930
-1.9 C (28.6 F)
1931
-4.7 C (23.5 F)
1932
-6.0 C (21.2 F)
1933
-6.9 C (19.6 F)
1934
-3.2 C (26.2 F)
1935
-2.5 C (27.5 F)
1936
-3.1 C (26.4 F)
1942
n/a
1943
-3.7 C (25.3 F)
1944
-4.6 C (23.7 F)
1945
-5.1 C (22.8 F)
1946
-4.6 C (23.7 F)
1947
-8.4 C (16.9 F)
1948
-7.4 C (18.7 F)
1949
-2.7 C (27.1 F)
1950
-8.2 C (17.2 F)
1951
-4.6 C (23.7 F)
1952
-3.6 C (25.5 F)
1953
-11.0 C (12.2 F)
1954
-5.1 C (22.8 F)
1955
-8.6 C (16.5 F)
1956
-8.0 C (17.6 F)
1957
-4.8 C (23.4 F)
1958
-9.5 C (14.9 F)
1959
-5.7 C (21.7 F)
1960
-8.0 C (17.6 F)
1961
-3.5 C (25.7 F)
1962
-5.6 C (21.9 F)
1963
-7.0 C (19.4 F)
Wettest day (Rx1day)
The wettest day of the year at Ona, 1911 to 1963. The record is 70.3 mm (2.8 in) in 1921, marked on the chart; the median year is 34.3 mm (1.4 in).
Wettest day (Rx1day) at Ona by year
Year
Wettest day (Rx1day)
1911
n/a
1912
n/a
1913
n/a
1914
n/a
1915
n/a
1916
n/a
1917
n/a
1918
0.0 mm (0.00 in)
1919
24.8 mm (1.0 in)
1920
38.5 mm (1.5 in)
1921
70.3 mm (2.8 in)
1922
68.8 mm (2.7 in)
1923
28.1 mm (1.1 in)
1924
24.9 mm (1.0 in)
1925
34.3 mm (1.4 in)
1926
43.0 mm (1.7 in)
1927
30.8 mm (1.2 in)
1928
40.8 mm (1.6 in)
1929
23.4 mm (0.9 in)
1930
27.5 mm (1.1 in)
1931
28.9 mm (1.1 in)
1932
51.4 mm (2.0 in)
1933
37.8 mm (1.5 in)
1934
29.7 mm (1.2 in)
1935
33.3 mm (1.3 in)
1936
36.1 mm (1.4 in)
1942
5.6 mm (0.22 in)
1943
50.8 mm (2.0 in)
1944
22.2 mm (0.9 in)
1945
51.9 mm (2.0 in)
1946
50.1 mm (2.0 in)
1947
31.9 mm (1.3 in)
1948
32.2 mm (1.3 in)
1949
44.2 mm (1.7 in)
1950
56.6 mm (2.2 in)
1951
26.1 mm (1.0 in)
1952
34.1 mm (1.3 in)
1953
49.0 mm (1.9 in)
1954
29.6 mm (1.2 in)
1955
56.6 mm (2.2 in)
1956
67.8 mm (2.7 in)
1957
49.8 mm (2.0 in)
1958
25.8 mm (1.0 in)
1959
37.2 mm (1.5 in)
1960
34.4 mm (1.4 in)
1961
31.9 mm (1.3 in)
1962
38.5 mm (1.5 in)
1963
21.6 mm (0.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Ona, 1911 to 1963. The record is 124.0 mm (4.9 in) in 1957, marked on the chart; the median year is 78.8 mm (3.1 in).
Wettest five days (Rx5day) at Ona by year
Year
Wettest five days (Rx5day)
1911
n/a
1912
n/a
1913
n/a
1914
n/a
1915
n/a
1916
n/a
1917
n/a
1918
n/a
1919
57.7 mm (2.3 in)
1920
89.8 mm (3.5 in)
1921
122.4 mm (4.8 in)
1922
86.6 mm (3.4 in)
1923
81.6 mm (3.2 in)
1924
53.6 mm (2.1 in)
1925
72.3 mm (2.8 in)
1926
106.0 mm (4.2 in)
1927
82.4 mm (3.2 in)
1928
61.0 mm (2.4 in)
1929
53.3 mm (2.1 in)
1930
52.7 mm (2.1 in)
1931
62.5 mm (2.5 in)
1932
92.5 mm (3.6 in)
1933
88.8 mm (3.5 in)
1934
81.5 mm (3.2 in)
1935
80.6 mm (3.2 in)
1936
78.4 mm (3.1 in)
1942
n/a
1943
104.3 mm (4.1 in)
1944
44.2 mm (1.7 in)
1945
71.8 mm (2.8 in)
1946
77.5 mm (3.1 in)
1947
69.5 mm (2.7 in)
1948
72.6 mm (2.9 in)
1949
87.8 mm (3.5 in)
1950
83.9 mm (3.3 in)
1951
62.8 mm (2.5 in)
1952
75.8 mm (3.0 in)
1953
98.8 mm (3.9 in)
1954
109.6 mm (4.3 in)
1955
90.5 mm (3.6 in)
1956
104.8 mm (4.1 in)
1957
124.0 mm (4.9 in)
1958
81.4 mm (3.2 in)
1959
73.9 mm (2.9 in)
1960
51.4 mm (2.0 in)
1961
61.1 mm (2.4 in)
1962
78.8 mm (3.1 in)
1963
40.6 mm (1.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Ona, 1911 to 1963. The record is 33 days in 1925, marked on the chart; the median year is 19 days.
Longest dry spell (CDD) at Ona by year
Year
Longest dry spell (CDD)
1911
n/a
1912
n/a
1913
n/a
1914
n/a
1915
n/a
1916
n/a
1917
n/a
1918
1 day
1919
25 days
1920
12 days
1921
14 days
1922
32 days
1923
25 days
1924
12 days
1925
33 days
1926
21 days
1927
24 days
1928
24 days
1929
22 days
1930
32 days
1931
16 days
1932
12 days
1933
20 days
1934
21 days
1935
18 days
1936
28 days
1942
n/a
1943
20 days
1944
13 days
1945
14 days
1946
20 days
1947
32 days
1948
18 days
1949
12 days
1950
11 days
1951
24 days
1952
17 days
1953
11 days
1954
22 days
1955
20 days
1956
20 days
1957
13 days
1958
18 days
1959
21 days
1960
15 days
1961
15 days
1962
17 days
1963
13 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
22 years with a frost
Across 22 years with a frost, the median last spring frost at Ona falls on 10 April and the median first autumn frost on 29 November, which leaves a median of 233 days between them.
Frost dates and growing season at Ona
Measure
Median, all years
Earliest period
Recent period (1932 to 1962)
Recent against earliest
Fitted trend
Last spring frost
10 April
n/a
10 April
n/a
n/a
First autumn frost
29 November
n/a
29 November
n/a
n/a
Growing days
233 days
n/a
233 days
n/a
n/a
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
38 years, 1919 to 1962
A day with at least 36.5 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 86.5 mm (3.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Ona: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
36.5 mm (1.4 in)
5 years
48.3 mm (1.9 in)
10 years
56.7 mm (2.2 in)
25 years
68.1 mm (2.7 in)
50 years
77.1 mm (3.0 in)
Longer than the 38 years of record
100 years
86.5 mm (3.4 in)
Longer than the 38 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, 38 years of values from 1919 to 1962.
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: 70.3 mm (2.8 in) in 1921; 68.8 mm (2.7 in) in 1922; 67.8 mm (2.7 in) in 1956.
Download the Data
Data for Ona standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ona 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.