Record envelope, standing records and threshold days for Mifflintown (USC00365726), Pennsylvania, United States, with 36 years of record.
Key Facts for Mifflintown
Mifflintown (USC00365726) is a weather station in Pennsylvania, United States at 40.57 latitude and -77.41 longitude, 189 m (620 ft) above sea level.
The station reports from 1903 to 1938, 36 years of record.
1,464 records set at Mifflintown still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Mifflintown tied a daily record high maximum temperature of 25.6 C (78.1 F) on 13 April 1938.
About the Station
Location: Pennsylvania, United States, 40.57 latitude, -77.41 longitude.
Elevation: 189 m (620 ft).
Period of record: 1903 to 1938, 36 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 Mifflintown. 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 Mifflintown, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
24.4 C (75.9 F)
-35.0 C (-31.0 F)
n/a
n/a
Feb
23.3 C (73.9 F)
-31.1 C (-24.0 F)
n/a
n/a
Mar
29.4 C (84.9 F)
-20.6 C (-5.1 F)
n/a
n/a
Apr
35.0 C (95.0 F)
-11.7 C (10.9 F)
n/a
n/a
May
36.7 C (98.1 F)
-3.9 C (25.0 F)
n/a
n/a
Jun
39.4 C (102.9 F)
-1.1 C (30.0 F)
n/a
n/a
Jul
40.0 C (104.0 F)
4.4 C (39.9 F)
n/a
n/a
Aug
41.1 C (106.0 F)
4.4 C (39.9 F)
n/a
n/a
Sep
37.2 C (99.0 F)
-2.2 C (28.0 F)
n/a
n/a
Oct
32.8 C (91.0 F)
-7.8 C (18.0 F)
n/a
n/a
Nov
26.7 C (80.1 F)
-16.7 C (1.9 F)
n/a
n/a
Dec
20.0 C (68.0 F)
-25.6 C (-14.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Mifflintown still stand. 1930 holds the most, with 65.
Standing records at Mifflintown by the year they were set
Year set
Standing records
1903
27
1904
54
1905
43
1906
43
1907
50
1908
37
1909
41
1910
32
1911
47
1912
41
1913
32
1914
56
1915
35
1916
40
1917
49
1918
57
1919
33
1920
37
1921
47
1922
42
1923
42
1924
25
1925
52
1926
38
1927
46
1928
41
1929
55
1930
65
1931
36
1932
48
1933
53
1934
56
1935
11
1936
6
1937
30
1938
17
Wettest Day of Each Month
May: 119.4 mm (4.7 in)
The wettest day on record for each calendar month at Mifflintown. The most was 119.4 mm (4.7 in) on 20 May 1908.
Record daily precipitation for each month at Mifflintown
Month
Record daily precipitation (mm)
Date
Jan
50.3 mm (2.0 in)
12 January 1915
Feb
48.3 mm (1.9 in)
26 February 1908
Mar
37.8 mm (1.5 in)
27 March 1913
Apr
53.3 mm (2.1 in)
26 April 1937
May
119.4 mm (4.7 in)
20 May 1908
Jun
67.3 mm (2.6 in)
22 June 1918
Jul
67.3 mm (2.6 in)
2 July 1922
Aug
68.6 mm (2.7 in)
13 August 1927
Sep
100.8 mm (4.0 in)
21 September 1913
Oct
97.8 mm (3.9 in)
2 October 1929
Nov
84.3 mm (3.3 in)
13 November 1937
Dec
57.2 mm (2.3 in)
13 December 1915
Period of Record Coverage
1903 to 1938
Complete yearUnder 90 percent of days
36 years of record at Mifflintown, 1903 to 1938. 6 years have data for under 90 percent of days and are left out of rankings: 1903, 1931, 1935, 1936, 1937, 1938.
Cooler than the station meanWarmer than the station mean
One stripe for each of 28 complete years at Mifflintown, 1904 to 1934. Blue stripes are years cooler than the station's own mean of 10.5 C (50.9 F); red stripes are warmer. The coolest year was 1904, at 8.6 C (47.6 F), and the warmest was 1933, at 12.2 C (54.0 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at Mifflintown as warming stripes, 1904 to 1934
Year
Annual mean temperature
Difference from the station mean
1904
8.6 C
-1.86 C
1905
10.0 C
-0.54 C
1906
10.6 C
+0.07 C
1907
9.1 C
-1.41 C
1908
10.3 C
-0.16 C
1909
10.3 C
-0.23 C
1910
10.2 C
-0.32 C
1911
11.0 C
+0.53 C
1912
9.8 C
-0.67 C
1913
11.4 C
+0.91 C
1914
9.8 C
-0.72 C
1915
10.1 C
-0.40 C
1916
10.1 C
-0.37 C
1917
9.1 C
-1.37 C
1918
10.2 C
-0.26 C
1920
9.3 C
-1.23 C
1921
12.2 C
+1.69 C
1922
11.7 C
+1.21 C
1923
11.5 C
+1.00 C
1924
10.2 C
-0.34 C
1925
10.9 C
+0.44 C
1926
9.9 C
-0.64 C
1927
10.6 C
+0.06 C
1928
10.6 C
+0.08 C
1930
11.1 C
+0.62 C
1932
11.5 C
+1.00 C
1933
12.2 C
+1.71 C
1934
11.8 C
+1.28 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
1903 to 1938
Yearly extremes at Mifflintown: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
41.1 C (106.0 F)
1930
36.4 C (97.5 F)
36
Coldest night (TNn)
-35.0 C (-31.0 F)
1912
-20.8 C (-5.5 F)
36
Wettest day (Rx1day)
119.4 mm (4.7 in)
1908
57.6 mm (2.3 in)
36
Wettest five days (Rx5day)
150.9 mm (5.9 in)
1908
89.9 mm (3.5 in)
36
Longest dry spell (CDD)
33 days
1934
17 days
36
Hottest day (TXx)
The hottest day of the year at Mifflintown, 1903 to 1938. The record is 41.1 C (106.0 F) in 1930, marked on the chart; the median year is 36.4 C (97.5 F).
Hottest day (TXx) at Mifflintown by year
Year
Hottest day (TXx)
1903
35.0 C (95.0 F)
1904
35.0 C (95.0 F)
1905
34.4 C (93.9 F)
1906
33.9 C (93.0 F)
1907
33.3 C (91.9 F)
1908
37.2 C (99.0 F)
1909
36.7 C (98.1 F)
1910
35.0 C (95.0 F)
1911
38.9 C (102.0 F)
1912
35.6 C (96.1 F)
1913
36.7 C (98.1 F)
1914
35.0 C (95.0 F)
1915
33.9 C (93.0 F)
1916
38.3 C (100.9 F)
1917
37.2 C (99.0 F)
1918
40.0 C (104.0 F)
1919
36.7 C (98.1 F)
1920
32.2 C (90.0 F)
1921
36.1 C (97.0 F)
1922
37.2 C (99.0 F)
1923
38.9 C (102.0 F)
1924
36.1 C (97.0 F)
1925
37.8 C (100.0 F)
1926
38.9 C (102.0 F)
1927
34.4 C (93.9 F)
1928
35.0 C (95.0 F)
1929
36.1 C (97.0 F)
1930
41.1 C (106.0 F)
1931
40.0 C (104.0 F)
1932
37.2 C (99.0 F)
1933
38.9 C (102.0 F)
1934
40.0 C (104.0 F)
1935
32.8 C (91.0 F)
1936
17.2 C (63.0 F)
1937
37.2 C (99.0 F)
1938
28.9 C (84.0 F)
Coldest night (TNn)
The coldest night of the year at Mifflintown, 1903 to 1938. The record is -35.0 C (-31.0 F) in 1912, marked on the chart; the median year is -20.8 C (-5.5 F).
Coldest night (TNn) at Mifflintown by year
Year
Coldest night (TNn)
1903
-16.1 C (3.0 F)
1904
-28.9 C (-20.0 F)
1905
-21.1 C (-6.0 F)
1906
-25.6 C (-14.1 F)
1907
-26.7 C (-16.1 F)
1908
-25.0 C (-13.0 F)
1909
-22.8 C (-9.0 F)
1910
-23.9 C (-11.0 F)
1911
-12.8 C (9.0 F)
1912
-35.0 C (-31.0 F)
1913
-16.1 C (3.0 F)
1914
-31.1 C (-24.0 F)
1915
-21.1 C (-6.0 F)
1916
-23.3 C (-9.9 F)
1917
-22.8 C (-9.0 F)
1918
-28.9 C (-20.0 F)
1919
-25.0 C (-13.0 F)
1920
-18.3 C (-0.9 F)
1921
-20.6 C (-5.1 F)
1922
-20.6 C (-5.1 F)
1923
-16.1 C (3.0 F)
1924
-20.0 C (-4.0 F)
1925
-25.6 C (-14.1 F)
1926
-20.0 C (-4.0 F)
1927
-17.8 C (0.0 F)
1928
-20.0 C (-4.0 F)
1929
-16.7 C (1.9 F)
1930
-21.1 C (-6.0 F)
1931
-13.3 C (8.1 F)
1932
-18.3 C (-0.9 F)
1933
-18.9 C (-2.0 F)
1934
-27.2 C (-17.0 F)
1935
-21.1 C (-6.0 F)
1936
-14.4 C (6.1 F)
1937
-11.7 C (10.9 F)
1938
-15.0 C (5.0 F)
Wettest day (Rx1day)
The wettest day of the year at Mifflintown, 1903 to 1938. The record is 119.4 mm (4.7 in) in 1908, marked on the chart; the median year is 57.6 mm (2.3 in).
Wettest day (Rx1day) at Mifflintown by year
Year
Wettest day (Rx1day)
1903
58.4 mm (2.3 in)
1904
41.9 mm (1.6 in)
1905
63.0 mm (2.5 in)
1906
57.9 mm (2.3 in)
1907
69.9 mm (2.8 in)
1908
119.4 mm (4.7 in)
1909
50.8 mm (2.0 in)
1910
46.2 mm (1.8 in)
1911
67.1 mm (2.6 in)
1912
48.8 mm (1.9 in)
1913
100.8 mm (4.0 in)
1914
48.0 mm (1.9 in)
1915
57.2 mm (2.3 in)
1916
56.1 mm (2.2 in)
1917
72.1 mm (2.8 in)
1918
67.3 mm (2.6 in)
1919
55.9 mm (2.2 in)
1920
60.2 mm (2.4 in)
1921
51.6 mm (2.0 in)
1922
67.3 mm (2.6 in)
1923
57.2 mm (2.3 in)
1924
58.4 mm (2.3 in)
1925
45.7 mm (1.8 in)
1926
78.7 mm (3.1 in)
1927
68.6 mm (2.7 in)
1928
50.8 mm (2.0 in)
1929
97.8 mm (3.9 in)
1930
44.7 mm (1.8 in)
1931
54.6 mm (2.1 in)
1932
55.4 mm (2.2 in)
1933
68.6 mm (2.7 in)
1934
98.0 mm (3.9 in)
1935
27.2 mm (1.1 in)
1936
35.8 mm (1.4 in)
1937
84.3 mm (3.3 in)
1938
25.9 mm (1.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Mifflintown, 1903 to 1938. The record is 150.9 mm (5.9 in) in 1908, marked on the chart; the median year is 89.9 mm (3.5 in).
Wettest five days (Rx5day) at Mifflintown by year
Year
Wettest five days (Rx5day)
1903
76.0 mm (3.0 in)
1904
53.6 mm (2.1 in)
1905
97.5 mm (3.8 in)
1906
69.1 mm (2.7 in)
1907
94.0 mm (3.7 in)
1908
150.9 mm (5.9 in)
1909
69.8 mm (2.7 in)
1910
111.3 mm (4.4 in)
1911
114.3 mm (4.5 in)
1912
86.0 mm (3.4 in)
1913
112.8 mm (4.4 in)
1914
79.0 mm (3.1 in)
1915
81.3 mm (3.2 in)
1916
86.6 mm (3.4 in)
1917
133.1 mm (5.2 in)
1918
85.6 mm (3.4 in)
1919
99.8 mm (3.9 in)
1920
104.0 mm (4.1 in)
1921
97.3 mm (3.8 in)
1922
105.9 mm (4.2 in)
1923
80.8 mm (3.2 in)
1924
110.3 mm (4.3 in)
1925
63.0 mm (2.5 in)
1926
102.1 mm (4.0 in)
1927
96.8 mm (3.8 in)
1928
79.0 mm (3.1 in)
1929
112.8 mm (4.4 in)
1930
57.2 mm (2.3 in)
1931
89.2 mm (3.5 in)
1932
79.8 mm (3.1 in)
1933
95.0 mm (3.7 in)
1934
119.6 mm (4.7 in)
1935
50.1 mm (2.0 in)
1936
50.8 mm (2.0 in)
1937
90.6 mm (3.6 in)
1938
60.7 mm (2.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Mifflintown, 1903 to 1938. The record is 33 days in 1934, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Mifflintown by year
Year
Longest dry spell (CDD)
1903
18 days
1904
18 days
1905
14 days
1906
17 days
1907
15 days
1908
21 days
1909
24 days
1910
14 days
1911
15 days
1912
15 days
1913
15 days
1914
16 days
1915
14 days
1916
13 days
1917
22 days
1918
18 days
1919
14 days
1920
15 days
1921
15 days
1922
24 days
1923
20 days
1924
20 days
1925
22 days
1926
23 days
1927
13 days
1928
18 days
1929
12 days
1930
16 days
1931
18 days
1932
22 days
1933
21 days
1934
33 days
1935
16 days
1936
11 days
1937
20 days
1938
8 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
28 years with a frost
Across 28 years with a frost, the median last spring frost at Mifflintown falls on 5 May and the median first autumn frost on 8 October, which leaves a median of 153 days between them.
Fitted over all years, the growing season changes by +7.9 days per decade at this station.
Frost dates and growing season at Mifflintown
Measure
Median, all years
Earliest period
Recent period (1904 to 1934)
Recent against earliest
Fitted trend
Last spring frost
5 May
n/a
5 May
n/a
-5.5 days per decade
First autumn frost
8 October
n/a
8 October
n/a
+2.4 days per decade
Growing days
153 days
n/a
153 days
n/a
+7.9 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.
Download the Data
Data for Mifflintown standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mifflintown 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.