Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Farnham. 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 Farnham, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
14.4 C (57.9 F)
-42.8 C (-45.0 F)
n/a
n/a
Feb
17.0 C (62.6 F)
-40.0 C (-40.0 F)
n/a
n/a
Mar
25.0 C (77.0 F)
-38.9 C (-38.0 F)
n/a
n/a
Apr
29.4 C (84.9 F)
-17.8 C (0.0 F)
n/a
n/a
May
32.2 C (90.0 F)
-5.6 C (21.9 F)
n/a
n/a
Jun
34.4 C (93.9 F)
-1.7 C (28.9 F)
n/a
n/a
Jul
39.4 C (102.9 F)
3.3 C (37.9 F)
n/a
n/a
Aug
36.7 C (98.1 F)
1.1 C (34.0 F)
n/a
n/a
Sep
33.9 C (93.0 F)
-4.5 C (23.9 F)
n/a
n/a
Oct
28.9 C (84.0 F)
-11.1 C (12.0 F)
n/a
n/a
Nov
23.3 C (73.9 F)
-25.6 C (-14.1 F)
n/a
n/a
Dec
17.8 C (64.0 F)
-37.2 C (-35.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Farnham still stand. 1981 holds the most, with 49.
Standing records at Farnham by the year they were set
Year set
Standing records
1917
28
1918
35
1919
22
1920
23
1921
42
1922
22
1923
45
1924
18
1925
28
1926
23
1927
24
1928
11
1929
24
1930
31
1931
24
1932
33
1933
34
1934
37
1935
30
1936
36
1937
20
1938
29
1939
22
1940
19
1941
27
1952
24
1953
28
1954
22
1955
30
1956
16
1957
28
1958
8
1959
25
1960
14
1961
20
1962
14
1963
27
1964
26
1965
25
1966
22
1967
16
1968
30
1969
20
1970
23
1971
23
1972
20
1973
32
1974
23
1975
25
1976
28
1977
25
1978
17
1979
41
1980
19
1981
49
1982
38
1983
19
All-Time Record Progression
3 new records
3 all-time records were set at Farnham between 14 January 1957 and 3 January 1981. Each dot is a new record.
When Farnham set new all-time records
Date
Kind
Detail
1957-01-14
Record low minimum temperature
Record low minimum temperature -42.8 C (-45.0 F)
1972-08-07
Record daily precipitation
Record daily precipitation 90.7 mm (3.6 in)
1981-01-03
Record low maximum temperature
Record low maximum temperature -30.0 C (-22.0 F)
Wettest Day of Each Month
Aug: 90.7 mm (3.6 in)
The wettest day on record for each calendar month at Farnham. The most was 90.7 mm (3.6 in) on 7 August 1972.
Record daily precipitation for each month at Farnham
Month
Record daily precipitation (mm)
Date
Jan
30.5 mm (1.2 in)
30 January 1925
Feb
43.2 mm (1.7 in)
13 February 1923
Mar
35.6 mm (1.4 in)
7 March 1920
Apr
42.7 mm (1.7 in)
2 April 1970
May
50.8 mm (2.0 in)
19 May 1936
Jun
77.2 mm (3.0 in)
27 June 1954
Jul
85.6 mm (3.4 in)
11 July 1970
Aug
90.7 mm (3.6 in)
7 August 1972
Sep
61.0 mm (2.4 in)
22 September 1931
Oct
81.5 mm (3.2 in)
3 October 1973
Nov
67.8 mm (2.7 in)
4 November 1927
Dec
50.2 mm (2.0 in)
12 December 1983
Period of Record Coverage
1917 to 1983
Complete yearUnder 90 percent of days
57 years of record at Farnham, 1917 to 1983. 4 years have data for under 90 percent of days and are left out of rankings: 1917, 1926, 1940, 1941.
Cooler than the station meanWarmer than the station mean
One stripe for each of 51 complete years at Farnham, 1918 to 1983. Blue stripes are years cooler than the station's own mean of 5.7 C (42.3 F); red stripes are warmer. The coolest year was 1918, at 4.4 C (39.9 F), and the warmest was 1953, at 7.9 C (46.1 F). The strongest colour marks a difference of 2.2 C (4.0 F).
Annual mean temperature at Farnham as warming stripes, 1918 to 1983
Year
Annual mean temperature
Difference from the station mean
1918
4.4 C
-1.32 C
1919
5.6 C
-0.15 C
1920
5.2 C
-0.58 C
1921
6.9 C
+1.18 C
1922
5.6 C
-0.13 C
1923
4.5 C
-1.24 C
1924
4.9 C
-0.79 C
1925
5.3 C
-0.43 C
1927
5.9 C
+0.12 C
1928
5.9 C
+0.16 C
1929
5.4 C
-0.35 C
1930
6.3 C
+0.60 C
1931
6.8 C
+1.05 C
1932
6.1 C
+0.40 C
1933
5.7 C
-0.02 C
1934
4.8 C
-0.90 C
1935
5.0 C
-0.72 C
1936
5.3 C
-0.45 C
1937
6.8 C
+1.09 C
1938
6.4 C
+0.66 C
1939
4.8 C
-0.94 C
1953
7.9 C
+2.12 C
1954
6.1 C
+0.35 C
1955
6.3 C
+0.55 C
1956
5.5 C
-0.20 C
1957
6.3 C
+0.61 C
1958
5.4 C
-0.35 C
1959
6.1 C
+0.41 C
1960
6.0 C
+0.30 C
1961
5.9 C
+0.13 C
1962
5.0 C
-0.71 C
1963
4.7 C
-0.99 C
1964
6.1 C
+0.38 C
1965
5.4 C
-0.32 C
1966
6.0 C
+0.22 C
1967
5.5 C
-0.22 C
1968
5.4 C
-0.37 C
1969
5.8 C
+0.04 C
1970
5.2 C
-0.56 C
1971
5.5 C
-0.22 C
1972
4.9 C
-0.82 C
1974
5.4 C
-0.29 C
1975
6.4 C
+0.70 C
1976
5.2 C
-0.58 C
1977
6.3 C
+0.54 C
1978
5.1 C
-0.67 C
1979
6.7 C
+0.96 C
1980
5.5 C
-0.28 C
1981
6.6 C
+0.91 C
1982
5.9 C
+0.13 C
1983
6.7 C
+0.96 C
The fitted trend in annual mean temperature here over 1918 to 1983 is 0.05 C (-0.04 to 0.14) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.3) per decade. The slope is a straight line fitted to 51 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Farnham
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.05 C (-0.04 to 0.14) per decade
0.1 F (-0.1 to 0.3) per decade
1918 to 1983
51
Not clearly different from zero
Mean daily maximum
-0.06 C (-0.16 to 0.03) per decade
-0.1 F (-0.3 to 0.1) per decade
1918 to 1983
51
Not clearly different from zero
Mean daily minimum
0.2 C (0.1 to 0.3) per decade
0.3 F (0.1 to 0.5) per decade
1918 to 1983
51
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
1917 to 1983
Yearly extremes at Farnham: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
39.4 C (102.9 F)
1917
32.2 C (90.0 F)
57
Coldest night (TNn)
-42.8 C (-45.0 F)
1957
-34.4 C (-29.9 F)
57
Wettest day (Rx1day)
90.7 mm (3.6 in)
1972
49.5 mm (1.9 in)
57
Wettest five days (Rx5day)
137.9 mm (5.4 in)
1922
74.4 mm (2.9 in)
57
Longest dry spell (CDD)
28 days
1921
14 days
57
Hottest day (TXx)
The hottest day of the year at Farnham, 1917 to 1983. The record is 39.4 C (102.9 F) in 1917, marked on the chart; the median year is 32.2 C (90.0 F).
Hottest day (TXx) at Farnham by year
Year
Hottest day (TXx)
1917
39.4 C (102.9 F)
1918
33.3 C (91.9 F)
1919
34.4 C (93.9 F)
1920
32.2 C (90.0 F)
1921
37.8 C (100.0 F)
1922
31.7 C (89.1 F)
1923
32.2 C (90.0 F)
1924
31.7 C (89.1 F)
1925
33.3 C (91.9 F)
1926
30.6 C (87.1 F)
1927
30.6 C (87.1 F)
1928
31.7 C (89.1 F)
1929
32.2 C (90.0 F)
1930
31.7 C (89.1 F)
1931
34.4 C (93.9 F)
1932
31.7 C (89.1 F)
1933
34.4 C (93.9 F)
1934
32.8 C (91.0 F)
1935
33.3 C (91.9 F)
1936
30.6 C (87.1 F)
1937
32.2 C (90.0 F)
1938
32.8 C (91.0 F)
1939
33.9 C (93.0 F)
1940
31.1 C (88.0 F)
1941
32.2 C (90.0 F)
1952
36.7 C (98.1 F)
1953
34.4 C (93.9 F)
1954
31.7 C (89.1 F)
1955
34.4 C (93.9 F)
1956
32.8 C (91.0 F)
1957
32.2 C (90.0 F)
1958
31.1 C (88.0 F)
1959
33.9 C (93.0 F)
1960
32.8 C (91.0 F)
1961
30.6 C (87.1 F)
1962
31.7 C (89.1 F)
1963
33.3 C (91.9 F)
1964
33.3 C (91.9 F)
1965
31.7 C (89.1 F)
1966
32.2 C (90.0 F)
1967
30.6 C (87.1 F)
1968
31.7 C (89.1 F)
1969
31.7 C (89.1 F)
1970
32.8 C (91.0 F)
1971
32.2 C (90.0 F)
1972
31.1 C (88.0 F)
1973
32.2 C (90.0 F)
1974
31.1 C (88.0 F)
1975
35.0 C (95.0 F)
1976
30.6 C (87.1 F)
1977
32.8 C (91.0 F)
1978
31.7 C (89.1 F)
1979
32.8 C (91.0 F)
1980
31.5 C (88.7 F)
1981
32.5 C (90.5 F)
1982
33.5 C (92.3 F)
1983
34.0 C (93.2 F)
Coldest night (TNn)
The coldest night of the year at Farnham, 1917 to 1983. The record is -42.8 C (-45.0 F) in 1957, marked on the chart; the median year is -34.4 C (-29.9 F).
Coldest night (TNn) at Farnham by year
Year
Coldest night (TNn)
1917
-31.1 C (-24.0 F)
1918
-37.2 C (-35.0 F)
1919
-27.2 C (-17.0 F)
1920
-39.4 C (-38.9 F)
1921
-30.6 C (-23.1 F)
1922
-34.4 C (-29.9 F)
1923
-38.9 C (-38.0 F)
1924
-33.3 C (-27.9 F)
1925
-40.0 C (-40.0 F)
1926
-31.7 C (-25.1 F)
1927
-36.1 C (-33.0 F)
1928
-32.8 C (-27.0 F)
1929
-31.7 C (-25.1 F)
1930
-35.6 C (-32.1 F)
1931
-38.3 C (-36.9 F)
1932
-30.6 C (-23.1 F)
1933
-37.2 C (-35.0 F)
1934
-38.3 C (-36.9 F)
1935
-33.9 C (-29.0 F)
1936
-31.7 C (-25.1 F)
1937
-29.4 C (-20.9 F)
1938
-38.9 C (-38.0 F)
1939
-33.3 C (-27.9 F)
1940
-34.4 C (-29.9 F)
1941
-35.0 C (-31.0 F)
1952
-33.3 C (-27.9 F)
1953
-26.1 C (-15.0 F)
1954
-37.2 C (-35.0 F)
1955
-35.6 C (-32.1 F)
1956
-29.4 C (-20.9 F)
1957
-42.8 C (-45.0 F)
1958
-29.4 C (-20.9 F)
1959
-32.8 C (-27.0 F)
1960
-32.8 C (-27.0 F)
1961
-32.8 C (-27.0 F)
1962
-32.2 C (-26.0 F)
1963
-37.2 C (-35.0 F)
1964
-28.3 C (-18.9 F)
1965
-31.7 C (-25.1 F)
1966
-35.0 C (-31.0 F)
1967
-32.8 C (-27.0 F)
1968
-32.2 C (-26.0 F)
1969
-28.9 C (-20.0 F)
1970
-34.4 C (-29.9 F)
1971
-38.9 C (-38.0 F)
1972
-40.0 C (-40.0 F)
1973
-35.0 C (-31.0 F)
1974
-37.2 C (-35.0 F)
1975
-31.1 C (-24.0 F)
1976
-37.2 C (-35.0 F)
1977
-30.0 C (-22.0 F)
1978
-35.0 C (-31.0 F)
1979
-35.6 C (-32.1 F)
1980
-34.5 C (-30.1 F)
1981
-37.0 C (-34.6 F)
1982
-37.5 C (-35.5 F)
1983
-34.5 C (-30.1 F)
Wettest day (Rx1day)
The wettest day of the year at Farnham, 1917 to 1983. The record is 90.7 mm (3.6 in) in 1972, marked on the chart; the median year is 49.5 mm (1.9 in).
Wettest day (Rx1day) at Farnham by year
Year
Wettest day (Rx1day)
1917
79.8 mm (3.1 in)
1918
48.3 mm (1.9 in)
1919
58.2 mm (2.3 in)
1920
45.7 mm (1.8 in)
1921
38.1 mm (1.5 in)
1922
87.9 mm (3.5 in)
1923
77.0 mm (3.0 in)
1924
55.9 mm (2.2 in)
1925
57.2 mm (2.3 in)
1926
59.7 mm (2.4 in)
1927
67.8 mm (2.7 in)
1928
37.3 mm (1.5 in)
1929
33.0 mm (1.3 in)
1930
56.1 mm (2.2 in)
1931
61.0 mm (2.4 in)
1932
74.7 mm (2.9 in)
1933
55.9 mm (2.2 in)
1934
43.4 mm (1.7 in)
1935
32.5 mm (1.3 in)
1936
50.8 mm (2.0 in)
1937
61.7 mm (2.4 in)
1938
51.8 mm (2.0 in)
1939
40.4 mm (1.6 in)
1940
24.4 mm (1.0 in)
1941
39.6 mm (1.6 in)
1952
49.5 mm (1.9 in)
1953
64.0 mm (2.5 in)
1954
77.2 mm (3.0 in)
1955
30.5 mm (1.2 in)
1956
30.2 mm (1.2 in)
1957
35.6 mm (1.4 in)
1958
41.4 mm (1.6 in)
1959
38.6 mm (1.5 in)
1960
34.0 mm (1.3 in)
1961
43.4 mm (1.7 in)
1962
42.9 mm (1.7 in)
1963
42.7 mm (1.7 in)
1964
47.2 mm (1.9 in)
1965
32.0 mm (1.3 in)
1966
25.4 mm (1.0 in)
1967
35.1 mm (1.4 in)
1968
62.5 mm (2.5 in)
1969
65.0 mm (2.6 in)
1970
85.6 mm (3.4 in)
1971
67.8 mm (2.7 in)
1972
90.7 mm (3.6 in)
1973
81.5 mm (3.2 in)
1974
48.5 mm (1.9 in)
1975
43.4 mm (1.7 in)
1976
53.3 mm (2.1 in)
1977
49.3 mm (1.9 in)
1978
36.8 mm (1.4 in)
1979
52.1 mm (2.1 in)
1980
31.0 mm (1.2 in)
1981
62.6 mm (2.5 in)
1982
56.0 mm (2.2 in)
1983
50.2 mm (2.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Farnham, 1917 to 1983. The record is 137.9 mm (5.4 in) in 1922, marked on the chart; the median year is 74.4 mm (2.9 in).
Wettest five days (Rx5day) at Farnham by year
Year
Wettest five days (Rx5day)
1917
124.5 mm (4.9 in)
1918
89.7 mm (3.5 in)
1919
83.0 mm (3.3 in)
1920
85.4 mm (3.4 in)
1921
60.2 mm (2.4 in)
1922
137.9 mm (5.4 in)
1923
96.5 mm (3.8 in)
1924
55.9 mm (2.2 in)
1925
91.5 mm (3.6 in)
1926
96.3 mm (3.8 in)
1927
120.7 mm (4.8 in)
1928
65.4 mm (2.6 in)
1929
55.4 mm (2.2 in)
1930
65.9 mm (2.6 in)
1931
92.5 mm (3.6 in)
1932
109.7 mm (4.3 in)
1933
80.0 mm (3.1 in)
1934
70.0 mm (2.8 in)
1935
55.1 mm (2.2 in)
1936
72.7 mm (2.9 in)
1937
66.1 mm (2.6 in)
1938
82.3 mm (3.2 in)
1939
52.4 mm (2.1 in)
1940
59.0 mm (2.3 in)
1941
57.6 mm (2.3 in)
1952
65.4 mm (2.6 in)
1953
86.4 mm (3.4 in)
1954
88.4 mm (3.5 in)
1955
51.6 mm (2.0 in)
1956
52.0 mm (2.0 in)
1957
55.8 mm (2.2 in)
1958
79.5 mm (3.1 in)
1959
100.2 mm (3.9 in)
1960
53.6 mm (2.1 in)
1961
70.9 mm (2.8 in)
1962
59.9 mm (2.4 in)
1963
59.4 mm (2.3 in)
1964
54.8 mm (2.2 in)
1965
68.6 mm (2.7 in)
1966
51.4 mm (2.0 in)
1967
54.9 mm (2.2 in)
1968
81.1 mm (3.2 in)
1969
72.9 mm (2.9 in)
1970
95.2 mm (3.7 in)
1971
84.1 mm (3.3 in)
1972
114.4 mm (4.5 in)
1973
108.7 mm (4.3 in)
1974
125.5 mm (4.9 in)
1975
83.0 mm (3.3 in)
1976
81.0 mm (3.2 in)
1977
72.2 mm (2.8 in)
1978
74.4 mm (2.9 in)
1979
80.8 mm (3.2 in)
1980
66.0 mm (2.6 in)
1981
95.0 mm (3.7 in)
1982
62.2 mm (2.4 in)
1983
92.4 mm (3.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Farnham, 1917 to 1983. The record is 28 days in 1921, marked on the chart; the median year is 14 days.
Longest dry spell (CDD) at Farnham by year
Year
Longest dry spell (CDD)
1917
11 days
1918
20 days
1919
16 days
1920
23 days
1921
28 days
1922
20 days
1923
17 days
1924
17 days
1925
21 days
1926
11 days
1927
16 days
1928
14 days
1929
13 days
1930
17 days
1931
18 days
1932
14 days
1933
12 days
1934
14 days
1935
9 days
1936
11 days
1937
13 days
1938
11 days
1939
21 days
1940
11 days
1941
15 days
1952
11 days
1953
15 days
1954
9 days
1955
17 days
1956
15 days
1957
23 days
1958
14 days
1959
11 days
1960
13 days
1961
17 days
1962
15 days
1963
19 days
1964
15 days
1965
19 days
1966
13 days
1967
17 days
1968
18 days
1969
13 days
1970
16 days
1971
12 days
1972
13 days
1973
13 days
1974
12 days
1975
12 days
1976
10 days
1977
15 days
1978
17 days
1979
13 days
1980
11 days
1981
7 days
1982
9 days
1983
15 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
51 years with a frost
Across 51 years with a frost, the median last spring frost at Farnham falls on 18 May and the median first autumn frost on 23 September, which leaves a median of 128 days between them.
Fitted over all years, the growing season changes by +4.5 days per decade at this station.
Frost dates and growing season at Farnham
Measure
Median, all years
Earliest period
Recent period (1953 to 1983)
Recent against earliest
Fitted trend
Last spring frost
18 May
n/a
15 May
n/a
-2.4 days per decade
First autumn frost
23 September
n/a
27 September
n/a
+2.1 days per decade
Growing days
128 days
n/a
136 days
n/a
+4.5 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
53 years, 1920 to 1983
A day with at least 49.1 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 102.4 mm (4.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Farnham: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
49.1 mm (1.9 in)
5 years
64.1 mm (2.5 in)
10 years
73.8 mm (2.9 in)
25 years
85.6 mm (3.4 in)
50 years
94.1 mm (3.7 in)
100 years
102.4 mm (4.0 in)
Longer than the 53 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, 53 years of values from 1920 to 1983.
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: 90.7 mm (3.6 in) in 1972; 87.9 mm (3.5 in) in 1922; 85.6 mm (3.4 in) in 1970.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Farnham standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Farnham 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.