Record envelope, standing records and threshold days for Franklin (USC00273177), New Hampshire, United States, with 72 years of record.
Key Facts for Franklin
Franklin (USC00273177) is a weather station in New Hampshire, United States at 43.45 latitude and -71.67 longitude, 119 m (390 ft) above sea level.
The station reports from 1900 to 1971, 72 years of record.
1,464 records set at Franklin still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Franklin set a daily record low minimum temperature of -10.0 C (14.0 F) on 9 April 1971.
About the Station
Location: New Hampshire, United States, 43.45 latitude, -71.67 longitude.
Elevation: 119 m (390 ft).
Period of record: 1900 to 1971, 72 years.
Eligible elements: tmax, tmin, prcp, snow.
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 Franklin. 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 Franklin, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
18.9 C (66.0 F)
-37.8 C (-36.0 F)
n/a
n/a
Feb
18.3 C (64.9 F)
-40.0 C (-40.0 F)
n/a
n/a
Mar
27.8 C (82.0 F)
-29.4 C (-20.9 F)
n/a
n/a
Apr
33.3 C (91.9 F)
-15.0 C (5.0 F)
n/a
n/a
May
37.8 C (100.0 F)
-6.7 C (19.9 F)
n/a
n/a
Jun
38.9 C (102.0 F)
-2.2 C (28.0 F)
n/a
n/a
Jul
39.4 C (102.9 F)
2.8 C (37.0 F)
n/a
n/a
Aug
37.8 C (100.0 F)
0.0 C (32.0 F)
n/a
n/a
Sep
36.7 C (98.1 F)
-5.0 C (23.0 F)
n/a
n/a
Oct
32.2 C (90.0 F)
-12.2 C (10.0 F)
n/a
n/a
Nov
27.2 C (81.0 F)
-22.2 C (-8.0 F)
n/a
n/a
Dec
17.2 C (63.0 F)
-33.3 C (-27.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Franklin still stand. 1914 holds the most, with 37.
Standing records at Franklin by the year they were set
Year set
Standing records
1900
4
1901
25
1902
25
1903
33
1904
20
1905
20
1906
29
1907
15
1908
26
1909
17
1910
20
1911
32
1912
23
1913
30
1914
37
1915
15
1916
24
1917
19
1918
32
1919
14
1920
15
1921
15
1922
16
1923
29
1924
12
1925
34
1926
25
1927
23
1928
13
1929
30
1930
28
1931
16
1932
27
1933
31
1934
25
1935
11
1936
27
1937
17
1938
22
1939
22
1940
22
1941
16
1942
24
1943
20
1944
18
1945
28
1946
24
1947
21
1948
31
1949
30
1950
21
1951
17
1952
14
1953
25
1954
14
1955
9
1956
23
1957
20
1958
12
1959
12
1960
8
1961
19
1962
10
1963
13
1964
20
1965
18
1966
11
1967
19
1968
15
1969
14
1970
13
1971
5
All-Time Record Progression
2 new records
2 all-time records were set at Franklin between 21 September 1938 and 16 February 1943. Each dot is a new record.
When Franklin set new all-time records
Date
Kind
Detail
1938-09-21
Record daily precipitation
Record daily precipitation 147.3 mm (5.8 in)
1943-02-16
Record low minimum temperature
Record low minimum temperature -40.0 C (-40.0 F)
Wettest Day of Each Month
Sep: 147.3 mm (5.8 in)
The wettest day on record for each calendar month at Franklin. The most was 147.3 mm (5.8 in) on 21 September 1938.
Record daily precipitation for each month at Franklin
Month
Record daily precipitation (mm)
Date
Jan
55.4 mm (2.2 in)
21 January 1964
Feb
55.9 mm (2.2 in)
10 February 1969
Mar
68.6 mm (2.7 in)
12 March 1936
Apr
62.5 mm (2.5 in)
7 April 1901
May
72.4 mm (2.9 in)
17 May 1916
Jun
70.6 mm (2.8 in)
15 June 1969
Jul
82.3 mm (3.2 in)
8 July 1915
Aug
84.3 mm (3.3 in)
31 August 1954
Sep
147.3 mm (5.8 in)
21 September 1938
Oct
94.5 mm (3.7 in)
6 October 1962
Nov
137.7 mm (5.4 in)
4 November 1927
Dec
68.8 mm (2.7 in)
12 December 1952
Period of Record Coverage
1900 to 1971
Complete yearUnder 90 percent of days
72 years of record at Franklin, 1900 to 1971. 2 years have data for under 90 percent of days and are left out of rankings: 1900, 1971.
Cooler than the station meanWarmer than the station mean
One stripe for each of 64 complete years at Franklin, 1901 to 1970. 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 1926, at 5.2 C (41.3 F), and the warmest was 1949, at 9.2 C (48.5 F). The strongest colour marks a difference of 2.2 C (4.0 F).
Annual mean temperature at Franklin as warming stripes, 1901 to 1970
Year
Annual mean temperature
Difference from the station mean
1901
7.3 C
-0.06 C
1902
7.0 C
-0.40 C
1903
6.7 C
-0.64 C
1904
5.8 C
-1.61 C
1905
6.7 C
-0.67 C
1906
7.4 C
+0.05 C
1908
8.0 C
+0.64 C
1909
7.5 C
+0.11 C
1910
7.9 C
+0.48 C
1912
7.3 C
-0.04 C
1913
8.6 C
+1.21 C
1914
6.8 C
-0.60 C
1915
8.3 C
+0.91 C
1916
7.2 C
-0.16 C
1917
6.2 C
-1.16 C
1919
8.2 C
+0.82 C
1920
6.9 C
-0.49 C
1921
8.1 C
+0.68 C
1922
6.9 C
-0.46 C
1923
6.0 C
-1.40 C
1924
5.7 C
-1.72 C
1925
6.2 C
-1.19 C
1926
5.2 C
-2.19 C
1927
7.0 C
-0.39 C
1928
6.7 C
-0.72 C
1929
6.6 C
-0.80 C
1930
7.0 C
-0.41 C
1931
7.5 C
+0.09 C
1932
7.0 C
-0.33 C
1933
7.0 C
-0.36 C
1935
6.8 C
-0.57 C
1936
6.9 C
-0.51 C
1937
7.9 C
+0.48 C
1938
8.1 C
+0.76 C
1939
7.1 C
-0.31 C
1940
6.5 C
-0.92 C
1941
7.4 C
+0.02 C
1942
7.3 C
-0.07 C
1944
7.3 C
-0.03 C
1945
7.6 C
+0.24 C
1946
7.9 C
+0.54 C
1947
7.9 C
+0.50 C
1948
7.5 C
+0.17 C
1949
9.2 C
+1.80 C
1950
7.7 C
+0.35 C
1951
7.9 C
+0.57 C
1952
8.3 C
+0.97 C
1953
9.0 C
+1.62 C
1954
7.8 C
+0.47 C
1955
8.1 C
+0.70 C
1956
7.1 C
-0.28 C
1957
8.2 C
+0.86 C
1958
7.1 C
-0.23 C
1959
8.2 C
+0.86 C
1960
8.0 C
+0.62 C
1961
8.1 C
+0.77 C
1962
7.0 C
-0.34 C
1963
7.6 C
+0.21 C
1964
7.7 C
+0.33 C
1965
7.4 C
-0.01 C
1966
7.5 C
+0.15 C
1967
7.3 C
-0.03 C
1969
7.9 C
+0.50 C
1970
8.1 C
+0.70 C
The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1901 to 1970. In Fahrenheit: 0.3 F (0.1 to 0.4) per decade. The slope is a straight line fitted to 64 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Franklin
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (0.1 to 0.2) per decade
0.3 F (0.1 to 0.4) per decade
1901 to 1970
64
Rise
Mean daily maximum
0.2 C (0.1 to 0.3) per decade
0.4 F (0.2 to 0.6) per decade
1901 to 1970
64
Rise
Mean daily minimum
0.07 C (-0.04 to 0.18) per decade
0.1 F (-0.1 to 0.3) per decade
1901 to 1970
64
Not clearly different from zero
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
1900 to 1971
Yearly extremes at Franklin: 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)
1911
35.0 C (95.0 F)
72
Coldest night (TNn)
-40.0 C (-40.0 F)
1943
-27.8 C (-18.0 F)
72
Wettest day (Rx1day)
147.3 mm (5.8 in)
1938
57.6 mm (2.3 in)
72
Wettest five days (Rx5day)
225.8 mm (8.9 in)
1938
82.0 mm (3.2 in)
72
Longest dry spell (CDD)
27 days
1915
17 days
72
Hottest day (TXx)
The hottest day of the year at Franklin, 1900 to 1971. The record is 39.4 C (102.9 F) in 1911, marked on the chart; the median year is 35.0 C (95.0 F).
Hottest day (TXx) at Franklin by year
Year
Hottest day (TXx)
1900
25.6 C (78.1 F)
1901
36.1 C (97.0 F)
1902
30.6 C (87.1 F)
1903
32.2 C (90.0 F)
1904
36.1 C (97.0 F)
1905
35.0 C (95.0 F)
1906
35.6 C (96.1 F)
1907
33.9 C (93.0 F)
1908
36.7 C (98.1 F)
1909
34.4 C (93.9 F)
1910
36.7 C (98.1 F)
1911
39.4 C (102.9 F)
1912
37.8 C (100.0 F)
1913
38.9 C (102.0 F)
1914
35.0 C (95.0 F)
1915
32.8 C (91.0 F)
1916
34.4 C (93.9 F)
1917
36.7 C (98.1 F)
1918
36.1 C (97.0 F)
1919
38.9 C (102.0 F)
1920
34.4 C (93.9 F)
1921
35.6 C (96.1 F)
1922
34.4 C (93.9 F)
1923
33.3 C (91.9 F)
1924
35.6 C (96.1 F)
1925
35.0 C (95.0 F)
1926
37.2 C (99.0 F)
1927
34.4 C (93.9 F)
1928
34.4 C (93.9 F)
1929
36.1 C (97.0 F)
1930
34.4 C (93.9 F)
1931
35.6 C (96.1 F)
1932
33.9 C (93.0 F)
1933
36.1 C (97.0 F)
1934
34.4 C (93.9 F)
1935
35.6 C (96.1 F)
1936
36.1 C (97.0 F)
1937
35.0 C (95.0 F)
1938
34.4 C (93.9 F)
1939
35.0 C (95.0 F)
1940
33.9 C (93.0 F)
1941
35.6 C (96.1 F)
1942
33.9 C (93.0 F)
1943
35.0 C (95.0 F)
1944
37.8 C (100.0 F)
1945
35.0 C (95.0 F)
1946
36.7 C (98.1 F)
1947
36.7 C (98.1 F)
1948
37.2 C (99.0 F)
1949
37.8 C (100.0 F)
1950
33.9 C (93.0 F)
1951
33.3 C (91.9 F)
1952
37.8 C (100.0 F)
1953
36.7 C (98.1 F)
1954
34.4 C (93.9 F)
1955
36.7 C (98.1 F)
1956
35.0 C (95.0 F)
1957
34.4 C (93.9 F)
1958
34.4 C (93.9 F)
1959
35.0 C (95.0 F)
1960
35.0 C (95.0 F)
1961
33.3 C (91.9 F)
1962
35.6 C (96.1 F)
1963
36.7 C (98.1 F)
1964
37.2 C (99.0 F)
1965
37.8 C (100.0 F)
1966
36.7 C (98.1 F)
1967
33.3 C (91.9 F)
1968
35.0 C (95.0 F)
1969
35.0 C (95.0 F)
1970
36.1 C (97.0 F)
1971
27.8 C (82.0 F)
Coldest night (TNn)
The coldest night of the year at Franklin, 1900 to 1971. The record is -40.0 C (-40.0 F) in 1943, marked on the chart; the median year is -27.8 C (-18.0 F).
Coldest night (TNn) at Franklin by year
Year
Coldest night (TNn)
1900
-20.0 C (-4.0 F)
1901
-25.0 C (-13.0 F)
1902
-25.6 C (-14.1 F)
1903
-27.2 C (-17.0 F)
1904
-30.6 C (-23.1 F)
1905
-29.4 C (-20.9 F)
1906
-24.4 C (-11.9 F)
1907
-27.8 C (-18.0 F)
1908
-27.2 C (-17.0 F)
1909
-26.7 C (-16.1 F)
1910
-26.1 C (-15.0 F)
1911
-23.3 C (-9.9 F)
1912
-30.0 C (-22.0 F)
1913
-23.3 C (-9.9 F)
1914
-29.4 C (-20.9 F)
1915
-26.7 C (-16.1 F)
1916
-26.1 C (-15.0 F)
1917
-33.3 C (-27.9 F)
1918
-30.6 C (-23.1 F)
1919
-25.6 C (-14.1 F)
1920
-35.6 C (-32.1 F)
1921
-25.6 C (-14.1 F)
1922
-37.8 C (-36.0 F)
1923
-30.6 C (-23.1 F)
1924
-33.3 C (-27.9 F)
1925
-34.4 C (-29.9 F)
1926
-26.7 C (-16.1 F)
1927
-30.6 C (-23.1 F)
1928
-25.6 C (-14.1 F)
1929
-31.7 C (-25.1 F)
1930
-27.2 C (-17.0 F)
1931
-30.0 C (-22.0 F)
1932
-24.4 C (-11.9 F)
1933
-33.3 C (-27.9 F)
1934
-32.8 C (-27.0 F)
1935
-30.6 C (-23.1 F)
1936
-30.6 C (-23.1 F)
1937
-22.8 C (-9.0 F)
1938
-31.7 C (-25.1 F)
1939
-27.8 C (-18.0 F)
1940
-26.1 C (-15.0 F)
1941
-22.8 C (-9.0 F)
1942
-30.0 C (-22.0 F)
1943
-40.0 C (-40.0 F)
1944
-30.6 C (-23.1 F)
1945
-28.9 C (-20.0 F)
1946
-27.8 C (-18.0 F)
1947
-26.7 C (-16.1 F)
1948
-33.3 C (-27.9 F)
1949
-25.0 C (-13.0 F)
1950
-28.9 C (-20.0 F)
1951
-30.0 C (-22.0 F)
1952
-25.6 C (-14.1 F)
1953
-20.0 C (-4.0 F)
1954
-27.2 C (-17.0 F)
1955
-25.0 C (-13.0 F)
1956
-26.1 C (-15.0 F)
1957
-35.6 C (-32.1 F)
1958
-28.9 C (-20.0 F)
1959
-25.6 C (-14.1 F)
1960
-25.6 C (-14.1 F)
1961
-32.8 C (-27.0 F)
1962
-28.9 C (-20.0 F)
1963
-30.0 C (-22.0 F)
1964
-27.8 C (-18.0 F)
1965
-27.2 C (-17.0 F)
1966
-27.2 C (-17.0 F)
1967
-26.7 C (-16.1 F)
1968
-28.3 C (-18.9 F)
1969
-26.1 C (-15.0 F)
1970
-27.2 C (-17.0 F)
1971
-34.4 C (-29.9 F)
Wettest day (Rx1day)
The wettest day of the year at Franklin, 1900 to 1971. The record is 147.3 mm (5.8 in) in 1938, marked on the chart; the median year is 57.6 mm (2.3 in).
Wettest day (Rx1day) at Franklin by year
Year
Wettest day (Rx1day)
1900
44.2 mm (1.7 in)
1901
64.3 mm (2.5 in)
1902
57.2 mm (2.3 in)
1903
63.0 mm (2.5 in)
1904
66.8 mm (2.6 in)
1905
70.1 mm (2.8 in)
1906
48.5 mm (1.9 in)
1907
61.7 mm (2.4 in)
1908
43.2 mm (1.7 in)
1909
42.7 mm (1.7 in)
1910
50.5 mm (2.0 in)
1911
57.2 mm (2.3 in)
1912
37.3 mm (1.5 in)
1913
69.9 mm (2.8 in)
1914
48.5 mm (1.9 in)
1915
82.3 mm (3.2 in)
1916
72.4 mm (2.9 in)
1917
42.9 mm (1.7 in)
1918
78.0 mm (3.1 in)
1919
62.0 mm (2.4 in)
1920
74.9 mm (2.9 in)
1921
62.5 mm (2.5 in)
1922
66.5 mm (2.6 in)
1923
56.1 mm (2.2 in)
1924
60.2 mm (2.4 in)
1925
55.9 mm (2.2 in)
1926
58.4 mm (2.3 in)
1927
137.7 mm (5.4 in)
1928
37.1 mm (1.5 in)
1929
43.2 mm (1.7 in)
1930
44.5 mm (1.8 in)
1931
34.3 mm (1.4 in)
1932
53.3 mm (2.1 in)
1933
60.5 mm (2.4 in)
1934
56.9 mm (2.2 in)
1935
47.8 mm (1.9 in)
1936
68.6 mm (2.7 in)
1937
72.4 mm (2.9 in)
1938
147.3 mm (5.8 in)
1939
49.5 mm (1.9 in)
1940
42.9 mm (1.7 in)
1941
47.8 mm (1.9 in)
1942
47.8 mm (1.9 in)
1943
71.9 mm (2.8 in)
1944
76.2 mm (3.0 in)
1945
67.6 mm (2.7 in)
1946
80.0 mm (3.1 in)
1947
74.2 mm (2.9 in)
1948
57.9 mm (2.3 in)
1949
31.8 mm (1.3 in)
1950
57.9 mm (2.3 in)
1951
63.5 mm (2.5 in)
1952
68.8 mm (2.7 in)
1953
68.1 mm (2.7 in)
1954
84.3 mm (3.3 in)
1955
59.9 mm (2.4 in)
1956
53.1 mm (2.1 in)
1957
44.7 mm (1.8 in)
1958
44.5 mm (1.8 in)
1959
58.7 mm (2.3 in)
1960
85.3 mm (3.4 in)
1961
26.2 mm (1.0 in)
1962
94.5 mm (3.7 in)
1963
47.8 mm (1.9 in)
1964
55.4 mm (2.2 in)
1965
32.5 mm (1.3 in)
1966
50.0 mm (2.0 in)
1967
35.6 mm (1.4 in)
1968
38.4 mm (1.5 in)
1969
70.6 mm (2.8 in)
1970
48.3 mm (1.9 in)
1971
28.7 mm (1.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Franklin, 1900 to 1971. The record is 225.8 mm (8.9 in) in 1938, marked on the chart; the median year is 82.0 mm (3.2 in).
Wettest five days (Rx5day) at Franklin by year
Year
Wettest five days (Rx5day)
1900
56.9 mm (2.2 in)
1901
96.8 mm (3.8 in)
1902
76.9 mm (3.0 in)
1903
103.5 mm (4.1 in)
1904
77.7 mm (3.1 in)
1905
105.2 mm (4.1 in)
1906
101.3 mm (4.0 in)
1907
72.4 mm (2.9 in)
1908
70.4 mm (2.8 in)
1909
69.7 mm (2.7 in)
1910
75.4 mm (3.0 in)
1911
72.7 mm (2.9 in)
1912
70.4 mm (2.8 in)
1913
77.3 mm (3.0 in)
1914
74.7 mm (2.9 in)
1915
131.5 mm (5.2 in)
1916
91.7 mm (3.6 in)
1917
70.6 mm (2.8 in)
1918
85.6 mm (3.4 in)
1919
98.8 mm (3.9 in)
1920
95.5 mm (3.8 in)
1921
81.4 mm (3.2 in)
1922
116.6 mm (4.6 in)
1923
83.8 mm (3.3 in)
1924
75.9 mm (3.0 in)
1925
77.2 mm (3.0 in)
1926
87.9 mm (3.5 in)
1927
153.7 mm (6.1 in)
1928
71.9 mm (2.8 in)
1929
70.6 mm (2.8 in)
1930
66.8 mm (2.6 in)
1931
75.4 mm (3.0 in)
1932
101.6 mm (4.0 in)
1933
73.0 mm (2.9 in)
1934
78.2 mm (3.1 in)
1935
68.9 mm (2.7 in)
1936
95.5 mm (3.8 in)
1937
101.4 mm (4.0 in)
1938
225.8 mm (8.9 in)
1939
71.6 mm (2.8 in)
1940
80.5 mm (3.2 in)
1941
92.8 mm (3.7 in)
1942
116.6 mm (4.6 in)
1943
100.1 mm (3.9 in)
1944
159.0 mm (6.3 in)
1945
96.8 mm (3.8 in)
1946
92.7 mm (3.6 in)
1947
125.0 mm (4.9 in)
1948
66.8 mm (2.6 in)
1949
64.0 mm (2.5 in)
1950
75.4 mm (3.0 in)
1951
91.4 mm (3.6 in)
1952
100.3 mm (3.9 in)
1953
92.2 mm (3.6 in)
1954
105.7 mm (4.2 in)
1955
118.8 mm (4.7 in)
1956
68.0 mm (2.7 in)
1957
71.6 mm (2.8 in)
1958
89.2 mm (3.5 in)
1959
83.9 mm (3.3 in)
1960
145.3 mm (5.7 in)
1961
46.9 mm (1.8 in)
1962
173.0 mm (6.8 in)
1963
101.1 mm (4.0 in)
1964
82.6 mm (3.3 in)
1965
53.6 mm (2.1 in)
1966
73.2 mm (2.9 in)
1967
68.9 mm (2.7 in)
1968
68.5 mm (2.7 in)
1969
98.4 mm (3.9 in)
1970
58.5 mm (2.3 in)
1971
44.1 mm (1.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Franklin, 1900 to 1971. The record is 27 days in 1915, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Franklin by year
Year
Longest dry spell (CDD)
1900
18 days
1901
19 days
1902
13 days
1903
17 days
1904
20 days
1905
24 days
1906
18 days
1907
13 days
1908
25 days
1909
14 days
1910
19 days
1911
17 days
1912
24 days
1913
14 days
1914
23 days
1915
27 days
1916
12 days
1917
21 days
1918
25 days
1919
19 days
1920
24 days
1921
18 days
1922
17 days
1923
20 days
1924
26 days
1925
15 days
1926
13 days
1927
15 days
1928
13 days
1929
15 days
1930
19 days
1931
15 days
1932
22 days
1933
13 days
1934
15 days
1935
19 days
1936
14 days
1937
14 days
1938
12 days
1939
19 days
1940
23 days
1941
22 days
1942
17 days
1943
14 days
1944
15 days
1945
11 days
1946
15 days
1947
26 days
1948
20 days
1949
22 days
1950
16 days
1951
11 days
1952
12 days
1953
14 days
1954
18 days
1955
19 days
1956
15 days
1957
17 days
1958
14 days
1959
14 days
1960
12 days
1961
17 days
1962
14 days
1963
24 days
1964
24 days
1965
19 days
1966
13 days
1967
14 days
1968
18 days
1969
16 days
1970
17 days
1971
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
64 years with a frost
Across 64 years with a frost, the median last spring frost at Franklin falls on 18 May and the median first autumn frost on 25 September, which leaves a median of 129 days between them.
In 1939 to 1970 the median growing season was 134 days. That is 8 days more than in 1901 to 1933.
Fitted over all years, the growing season changes by -0.5 days per decade at this station.
Frost dates and growing season at Franklin
Measure
Median, all years
Earliest period (1901 to 1933)
Recent period (1939 to 1970)
Recent against earliest
Fitted trend
Last spring frost
18 May
18 May
19 May
1 day later
+0.8 days per decade
First autumn frost
25 September
25 September
27 September
2 days later
+0.3 days per decade
Growing days
129 days
126 days
134 days
8 days more
-0.5 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
66 years, 1901 to 1970
A day with at least 56.2 mm (2.2 in) of rain is expected about once in 2 years. A day with at least 124.0 mm (4.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Franklin: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
56.2 mm (2.2 in)
5 years
73.5 mm (2.9 in)
10 years
85.3 mm (3.4 in)
25 years
100.6 mm (4.0 in)
50 years
112.2 mm (4.4 in)
100 years
124.0 mm (4.9 in)
Longer than the 66 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, 66 years of values from 1901 to 1970.
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: 147.3 mm (5.8 in) in 1938; 137.7 mm (5.4 in) in 1927; 94.5 mm (3.7 in) in 1962.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Franklin standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Franklin 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). Records are computed by this site and are not official.