Record envelope, standing records and threshold days for Wellsboro (USC00369407), Pennsylvania, United States, with 107 years of record.
Key Facts for Wellsboro
Wellsboro (USC00369407) is a weather station in Pennsylvania, United States at 41.74 latitude and -77.31 longitude, 421 m (1,380 ft) above sea level.
The station reports from 1893 to 1999, 107 years of record.
1,464 records set at Wellsboro still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Wellsboro set a daily record low minimum temperature of -6.7 C (19.9 F) on 26 April 1999.
About the Station
Location: Pennsylvania, United States, 41.74 latitude, -77.31 longitude.
Elevation: 421 m (1,380 ft).
Period of record: 1893 to 1999, 107 years.
Eligible elements: tmax, 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 Wellsboro. 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 Wellsboro, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
20.0 C (68.0 F)
-32.8 C (-27.0 F)
n/a
n/a
Feb
17.2 C (63.0 F)
-31.7 C (-25.1 F)
n/a
n/a
Mar
28.3 C (82.9 F)
-31.7 C (-25.1 F)
n/a
n/a
Apr
32.8 C (91.0 F)
-17.8 C (0.0 F)
n/a
n/a
May
35.0 C (95.0 F)
-6.1 C (21.0 F)
n/a
n/a
Jun
36.7 C (98.1 F)
-5.0 C (23.0 F)
n/a
n/a
Jul
38.3 C (100.9 F)
1.7 C (35.1 F)
n/a
n/a
Aug
37.8 C (100.0 F)
0.0 C (32.0 F)
n/a
n/a
Sep
33.9 C (93.0 F)
-3.9 C (25.0 F)
n/a
n/a
Oct
35.0 C (95.0 F)
-11.1 C (12.0 F)
n/a
n/a
Nov
24.4 C (75.9 F)
-18.9 C (-2.0 F)
n/a
n/a
Dec
20.0 C (68.0 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 Wellsboro still stand. 1896 holds the most, with 72.
Standing records at Wellsboro by the year they were set
Year set
Standing records
1893
45
1894
57
1895
62
1896
72
1897
33
1898
45
1899
41
1900
35
1901
34
1902
34
1903
41
1904
13
1905
24
1906
48
1907
29
1908
39
1909
36
1910
30
1911
36
1912
31
1913
22
1914
40
1915
18
1916
27
1917
46
1918
40
1919
25
1920
38
1921
15
1922
22
1923
31
1924
31
1925
38
1926
28
1927
40
1928
28
1929
46
1948
19
1949
35
1950
34
1997
12
1998
37
1999
7
All-Time Record Progression
1 new records
1 all-time records were set at Wellsboro between 19 August 1950 and 19 August 1950. Each dot is a new record.
When Wellsboro set new all-time records
Date
Kind
Detail
1950-08-19
Record daily precipitation
Record daily precipitation 132.8 mm (5.2 in)
Wettest Day of Each Month
Aug: 132.8 mm (5.2 in)
The wettest day on record for each calendar month at Wellsboro. The most was 132.8 mm (5.2 in) on 19 August 1950.
Record daily precipitation for each month at Wellsboro
Month
Record daily precipitation (mm)
Date
Jan
55.9 mm (2.2 in)
12 January 1915
Feb
74.7 mm (2.9 in)
6 February 1896
Mar
53.3 mm (2.1 in)
23 March 1903
Apr
63.5 mm (2.5 in)
24 April 1898
May
79.5 mm (3.1 in)
19 May 1894
Jun
60.2 mm (2.4 in)
3 June 1916
Jul
75.7 mm (3.0 in)
22 July 1919
Aug
132.8 mm (5.2 in)
19 August 1950
Sep
63.5 mm (2.5 in)
19 September 1894
Oct
73.7 mm (2.9 in)
13 October 1896
Nov
66.0 mm (2.6 in)
26 November 1900
Dec
54.6 mm (2.1 in)
26 December 1895
Period of Record Coverage
1893 to 1999
Complete yearUnder 90 percent of days
43 years of record at Wellsboro, 1893 to 1999. 9 years have data for under 90 percent of days and are left out of rankings: 1893, 1905, 1913, 1914, 1923, 1948, 1950, 1997 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 32 complete years at Wellsboro, 1894 to 1998. Blue stripes are years cooler than the station's own mean of 8.0 C (46.4 F); red stripes are warmer. The coolest year was 1917, at 6.1 C (43.0 F), and the warmest was 1898, at 9.5 C (49.0 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at Wellsboro as warming stripes, 1894 to 1998
Year
Annual mean temperature
Difference from the station mean
1894
8.4 C
+0.35 C
1895
6.6 C
-1.41 C
1896
7.6 C
-0.45 C
1897
8.3 C
+0.26 C
1898
9.5 C
+1.45 C
1899
8.8 C
+0.75 C
1900
9.3 C
+1.25 C
1901
8.6 C
+0.55 C
1903
8.9 C
+0.83 C
1904
7.4 C
-0.64 C
1906
8.2 C
+0.22 C
1907
7.4 C
-0.67 C
1908
8.8 C
+0.74 C
1909
8.4 C
+0.42 C
1910
8.4 C
+0.37 C
1911
9.1 C
+1.07 C
1912
8.0 C
+0.01 C
1915
7.5 C
-0.54 C
1916
7.4 C
-0.59 C
1917
6.1 C
-1.90 C
1918
7.7 C
-0.35 C
1919
8.1 C
+0.06 C
1920
6.7 C
-1.31 C
1921
8.7 C
+0.71 C
1922
8.1 C
+0.06 C
1924
6.6 C
-1.46 C
1926
6.7 C
-1.37 C
1927
8.0 C
+0.01 C
1928
8.0 C
+0.01 C
1929
7.8 C
-0.23 C
1949
8.8 C
+0.73 C
1998
9.0 C
+0.98 C
The fitted trend in annual mean temperature here over 1894 to 1998 is 0.01 C (-0.15 to 0.18) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.03 F (-0.27 to 0.32) 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 Wellsboro
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.01 C (-0.15 to 0.18) per decade
0.03 F (-0.27 to 0.32) per decade
1894 to 1998
32
Not clearly different from zero
Mean daily maximum
0.15 C (-0.03 to 0.33) per decade
0.3 F (-0.1 to 0.6) per decade
1894 to 1998
32
Not clearly different from zero
Mean daily minimum
-0.1 C (-0.3 to 0.1) per decade
-0.2 F (-0.6 to 0.1) per decade
1894 to 1998
32
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
1893 to 1999
Yearly extremes at Wellsboro: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
38.3 C (100.9 F)
1911
34.4 C (93.9 F)
43
Coldest night (TNn)
-33.3 C (-27.9 F)
1894
-26.1 C (-15.0 F)
43
Wettest day (Rx1day)
132.8 mm (5.2 in)
1950
50.8 mm (2.0 in)
42
Wettest five days (Rx5day)
202.7 mm (8.0 in)
1894
74.0 mm (2.9 in)
42
Longest dry spell (CDD)
44 days
1924
19 days
42
Hottest day (TXx)
The hottest day of the year at Wellsboro, 1893 to 1999. The record is 38.3 C (100.9 F) in 1911, marked on the chart; the median year is 34.4 C (93.9 F).
Hottest day (TXx) at Wellsboro by year
Year
Hottest day (TXx)
1893
32.2 C (90.0 F)
1894
35.0 C (95.0 F)
1895
36.7 C (98.1 F)
1896
33.9 C (93.0 F)
1897
35.0 C (95.0 F)
1898
35.6 C (96.1 F)
1899
35.6 C (96.1 F)
1900
35.6 C (96.1 F)
1901
35.6 C (96.1 F)
1902
33.3 C (91.9 F)
1903
33.9 C (93.0 F)
1904
33.9 C (93.0 F)
1905
34.4 C (93.9 F)
1906
32.2 C (90.0 F)
1907
33.3 C (91.9 F)
1908
34.4 C (93.9 F)
1909
35.6 C (96.1 F)
1910
36.7 C (98.1 F)
1911
38.3 C (100.9 F)
1912
34.4 C (93.9 F)
1913
31.7 C (89.1 F)
1914
33.3 C (91.9 F)
1915
31.1 C (88.0 F)
1916
34.4 C (93.9 F)
1917
36.1 C (97.0 F)
1918
37.8 C (100.0 F)
1919
35.0 C (95.0 F)
1920
31.7 C (89.1 F)
1921
34.4 C (93.9 F)
1922
33.3 C (91.9 F)
1923
33.9 C (93.0 F)
1924
33.9 C (93.0 F)
1925
35.0 C (95.0 F)
1926
35.0 C (95.0 F)
1927
34.4 C (93.9 F)
1928
33.9 C (93.0 F)
1929
33.9 C (93.0 F)
1948
36.7 C (98.1 F)
1949
35.6 C (96.1 F)
1950
33.9 C (93.0 F)
1997
32.8 C (91.0 F)
1998
32.8 C (91.0 F)
1999
23.3 C (73.9 F)
Coldest night (TNn)
The coldest night of the year at Wellsboro, 1893 to 1999. The record is -33.3 C (-27.9 F) in 1894, marked on the chart; the median year is -26.1 C (-15.0 F).
Coldest night (TNn) at Wellsboro by year
Year
Coldest night (TNn)
1893
-26.7 C (-16.1 F)
1894
-33.3 C (-27.9 F)
1895
-30.0 C (-22.0 F)
1896
-25.6 C (-14.1 F)
1897
-22.2 C (-8.0 F)
1898
-23.3 C (-9.9 F)
1899
-31.7 C (-25.1 F)
1900
-20.0 C (-4.0 F)
1901
-23.3 C (-9.9 F)
1902
-20.0 C (-4.0 F)
1903
-20.6 C (-5.1 F)
1904
-31.7 C (-25.1 F)
1905
-24.4 C (-11.9 F)
1906
-25.0 C (-13.0 F)
1907
-30.6 C (-23.1 F)
1908
-30.0 C (-22.0 F)
1909
-26.7 C (-16.1 F)
1910
-27.2 C (-17.0 F)
1911
-20.0 C (-4.0 F)
1912
-32.8 C (-27.0 F)
1913
-18.3 C (-0.9 F)
1914
-32.2 C (-26.0 F)
1915
-27.8 C (-18.0 F)
1916
-31.7 C (-25.1 F)
1917
-29.4 C (-20.9 F)
1918
-28.9 C (-20.0 F)
1919
-28.3 C (-18.9 F)
1920
-29.4 C (-20.9 F)
1921
-25.6 C (-14.1 F)
1922
-28.3 C (-18.9 F)
1923
-25.0 C (-13.0 F)
1924
-31.1 C (-24.0 F)
1925
-31.7 C (-25.1 F)
1926
-26.7 C (-16.1 F)
1927
-26.1 C (-15.0 F)
1928
-25.0 C (-13.0 F)
1929
-23.3 C (-9.9 F)
1948
-17.8 C (0.0 F)
1949
-21.1 C (-6.0 F)
1950
-23.9 C (-11.0 F)
1997
-12.2 C (10.0 F)
1998
-25.6 C (-14.1 F)
1999
-22.2 C (-8.0 F)
Wettest day (Rx1day)
The wettest day of the year at Wellsboro, 1893 to 1999. The record is 132.8 mm (5.2 in) in 1950, marked on the chart; the median year is 50.8 mm (2.0 in).
Wettest day (Rx1day) at Wellsboro by year
Year
Wettest day (Rx1day)
1893
57.2 mm (2.3 in)
1894
79.5 mm (3.1 in)
1895
57.2 mm (2.3 in)
1896
74.7 mm (2.9 in)
1897
44.5 mm (1.8 in)
1898
69.9 mm (2.8 in)
1899
45.7 mm (1.8 in)
1900
66.0 mm (2.6 in)
1901
49.5 mm (1.9 in)
1902
69.9 mm (2.8 in)
1903
53.3 mm (2.1 in)
1904
24.1 mm (0.9 in)
1905
n/a
1906
51.6 mm (2.0 in)
1907
32.5 mm (1.3 in)
1908
36.3 mm (1.4 in)
1909
58.4 mm (2.3 in)
1910
62.5 mm (2.5 in)
1911
24.9 mm (1.0 in)
1912
40.6 mm (1.6 in)
1913
50.8 mm (2.0 in)
1914
38.4 mm (1.5 in)
1915
55.9 mm (2.2 in)
1916
60.2 mm (2.4 in)
1917
45.2 mm (1.8 in)
1918
49.8 mm (2.0 in)
1919
75.7 mm (3.0 in)
1920
42.4 mm (1.7 in)
1921
39.1 mm (1.5 in)
1922
49.5 mm (1.9 in)
1923
45.2 mm (1.8 in)
1924
49.5 mm (1.9 in)
1925
50.8 mm (2.0 in)
1926
44.5 mm (1.8 in)
1927
51.3 mm (2.0 in)
1928
46.7 mm (1.8 in)
1929
57.4 mm (2.3 in)
1948
44.5 mm (1.8 in)
1949
58.4 mm (2.3 in)
1950
132.8 mm (5.2 in)
1997
29.7 mm (1.2 in)
1998
52.6 mm (2.1 in)
1999
51.1 mm (2.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Wellsboro, 1893 to 1999. The record is 202.7 mm (8.0 in) in 1894, marked on the chart; the median year is 74.0 mm (2.9 in).
Wettest five days (Rx5day) at Wellsboro by year
Year
Wettest five days (Rx5day)
1893
76.5 mm (3.0 in)
1894
202.7 mm (8.0 in)
1895
62.3 mm (2.5 in)
1896
55.9 mm (2.2 in)
1897
60.2 mm (2.4 in)
1898
114.4 mm (4.5 in)
1899
78.8 mm (3.1 in)
1900
114.2 mm (4.5 in)
1901
79.0 mm (3.1 in)
1902
139.8 mm (5.5 in)
1903
68.5 mm (2.7 in)
1904
30.5 mm (1.2 in)
1905
n/a
1906
71.4 mm (2.8 in)
1907
56.4 mm (2.2 in)
1908
71.6 mm (2.8 in)
1909
97.0 mm (3.8 in)
1910
114.5 mm (4.5 in)
1911
57.1 mm (2.2 in)
1912
60.7 mm (2.4 in)
1913
88.5 mm (3.5 in)
1914
43.2 mm (1.7 in)
1915
63.0 mm (2.5 in)
1916
87.1 mm (3.4 in)
1917
80.8 mm (3.2 in)
1918
76.9 mm (3.0 in)
1919
104.5 mm (4.1 in)
1920
90.0 mm (3.5 in)
1921
73.1 mm (2.9 in)
1922
72.6 mm (2.9 in)
1923
45.2 mm (1.8 in)
1924
94.0 mm (3.7 in)
1925
55.1 mm (2.2 in)
1926
63.6 mm (2.5 in)
1927
74.9 mm (2.9 in)
1928
91.4 mm (3.6 in)
1929
86.4 mm (3.4 in)
1948
57.7 mm (2.3 in)
1949
72.6 mm (2.9 in)
1950
161.2 mm (6.3 in)
1997
58.9 mm (2.3 in)
1998
78.5 mm (3.1 in)
1999
63.8 mm (2.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Wellsboro, 1893 to 1999. The record is 44 days in 1924, marked on the chart; the median year is 19 days.
Longest dry spell (CDD) at Wellsboro by year
Year
Longest dry spell (CDD)
1893
22 days
1894
24 days
1895
19 days
1896
9 days
1897
11 days
1898
19 days
1899
16 days
1900
25 days
1901
24 days
1902
20 days
1903
23 days
1904
4 days
1905
n/a
1906
27 days
1907
14 days
1908
21 days
1909
22 days
1910
14 days
1911
15 days
1912
12 days
1913
13 days
1914
20 days
1915
16 days
1916
16 days
1917
21 days
1918
19 days
1919
21 days
1920
14 days
1921
16 days
1922
24 days
1923
24 days
1924
44 days
1925
16 days
1926
29 days
1927
17 days
1928
18 days
1929
22 days
1948
14 days
1949
12 days
1950
15 days
1997
19 days
1998
18 days
1999
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
32 years with a frost
Across 32 years with a frost, the median last spring frost at Wellsboro falls on 29 May and the median first autumn frost on 21 September, which leaves a median of 116 days between them.
Fitted over all years, the growing season changes by -1.0 days per decade at this station.
Frost dates and growing season at Wellsboro
Measure
Median, all years
Earliest period
Recent period (1896 to 1998)
Recent against earliest
Fitted trend
Last spring frost
29 May
n/a
29 May
n/a
+1.5 days per decade
First autumn frost
21 September
n/a
22 September
n/a
+0.6 days per decade
Growing days
116 days
n/a
117 days
n/a
-1.0 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
30 years, 1894 to 1998
A day with at least 50.6 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 82.2 mm (3.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Wellsboro: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
50.6 mm (2.0 in)
5 years
61.3 mm (2.4 in)
10 years
67.4 mm (2.7 in)
25 years
74.0 mm (2.9 in)
50 years
78.4 mm (3.1 in)
Longer than the 30 years of record
100 years
82.2 mm (3.2 in)
Longer than the 30 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, 30 years of values from 1894 to 1998.
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: 79.5 mm (3.1 in) in 1894; 75.7 mm (3.0 in) in 1919; 69.9 mm (2.8 in) in 1902.
Download the Data
Data for Wellsboro standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Wellsboro 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.