Record envelope, standing records and threshold days for Muncy Valley (USC00366098), Pennsylvania, United States, with 34 years of record.
Key Facts for Muncy Valley
Muncy Valley (USC00366098) is a weather station in Pennsylvania, United States at 41.35 latitude and -76.59 longitude, 287 m (940 ft) above sea level.
The station reports from 1909 to 1942, 34 years of record.
1,464 records set at Muncy Valley still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Muncy Valley set a daily record precipitation of 26.4 mm (1.0 in) on 17 March 1942.
About the Station
Location: Pennsylvania, United States, 41.35 latitude, -76.59 longitude.
Elevation: 287 m (940 ft).
Period of record: 1909 to 1942, 34 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 Muncy Valley. 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 Muncy Valley, 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)
-30.0 C (-22.0 F)
n/a
n/a
Feb
18.3 C (64.9 F)
-30.6 C (-23.1 F)
n/a
n/a
Mar
26.7 C (80.1 F)
-27.8 C (-18.0 F)
n/a
n/a
Apr
33.3 C (91.9 F)
-17.2 C (1.0 F)
n/a
n/a
May
34.4 C (93.9 F)
-7.8 C (18.0 F)
n/a
n/a
Jun
36.7 C (98.1 F)
-3.3 C (26.1 F)
n/a
n/a
Jul
38.3 C (100.9 F)
3.3 C (37.9 F)
n/a
n/a
Aug
39.4 C (102.9 F)
1.1 C (34.0 F)
n/a
n/a
Sep
36.7 C (98.1 F)
-3.3 C (26.1 F)
n/a
n/a
Oct
32.2 C (90.0 F)
-9.4 C (15.1 F)
n/a
n/a
Nov
24.4 C (75.9 F)
-20.0 C (-4.0 F)
n/a
n/a
Dec
17.8 C (64.0 F)
-28.9 C (-20.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Muncy Valley still stand. 1929 holds the most, with 76.
Standing records at Muncy Valley by the year they were set
Year set
Standing records
1909
9
1910
47
1911
39
1912
10
1913
11
1914
67
1915
44
1916
53
1917
60
1918
62
1919
54
1920
65
1921
47
1922
38
1923
47
1924
49
1925
56
1926
42
1927
35
1928
41
1929
76
1930
54
1931
41
1932
50
1933
55
1934
45
1935
37
1936
61
1937
22
1938
30
1939
21
1940
57
1941
30
1942
9
Wettest Day of Each Month
Nov: 118.9 mm (4.7 in)
The wettest day on record for each calendar month at Muncy Valley. The most was 118.9 mm (4.7 in) on 16 November 1926.
Record daily precipitation for each month at Muncy Valley
Month
Record daily precipitation (mm)
Date
Jan
63.0 mm (2.5 in)
12 January 1915
Feb
81.0 mm (3.2 in)
14 February 1940
Mar
51.6 mm (2.0 in)
6 March 1932
Apr
61.7 mm (2.4 in)
24 April 1910
May
92.7 mm (3.6 in)
3 May 1929
Jun
62.2 mm (2.4 in)
7 June 1918
Jul
73.4 mm (2.9 in)
16 July 1937
Aug
95.8 mm (3.8 in)
31 August 1940
Sep
103.6 mm (4.1 in)
30 September 1924
Oct
83.3 mm (3.3 in)
6 October 1932
Nov
118.9 mm (4.7 in)
16 November 1926
Dec
57.9 mm (2.3 in)
14 December 1920
Period of Record Coverage
1909 to 1942
Complete yearUnder 90 percent of days
34 years of record at Muncy Valley, 1909 to 1942. 8 years have data for under 90 percent of days and are left out of rankings: 1909, 1911, 1912, 1913, 1927, 1937, 1941, 1942.
Cooler than the station meanWarmer than the station mean
One stripe for each of 24 complete years at Muncy Valley, 1910 to 1939. Blue stripes are years cooler than the station's own mean of 8.8 C (47.8 F); red stripes are warmer. The coolest year was 1917, at 7.5 C (45.5 F), and the warmest was 1921, at 10.4 C (50.8 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Muncy Valley as warming stripes, 1910 to 1939
Year
Annual mean temperature
Difference from the station mean
1910
9.0 C
+0.22 C
1914
8.1 C
-0.65 C
1915
8.8 C
+0.06 C
1916
8.3 C
-0.45 C
1917
7.5 C
-1.27 C
1918
8.9 C
+0.16 C
1919
9.5 C
+0.77 C
1920
8.7 C
-0.12 C
1921
10.4 C
+1.65 C
1922
9.1 C
+0.29 C
1923
8.6 C
-0.22 C
1924
7.8 C
-0.95 C
1925
8.6 C
-0.22 C
1928
9.0 C
+0.21 C
1929
9.1 C
+0.29 C
1930
9.0 C
+0.21 C
1931
9.8 C
+1.00 C
1932
9.1 C
+0.33 C
1933
9.1 C
+0.30 C
1934
8.4 C
-0.41 C
1935
7.8 C
-0.96 C
1936
8.1 C
-0.63 C
1938
8.9 C
+0.16 C
1939
8.9 C
+0.12 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
1909 to 1942
Yearly extremes at Muncy Valley: 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)
1930
35.0 C (95.0 F)
34
Coldest night (TNn)
-30.6 C (-23.1 F)
1934
-23.3 C (-9.9 F)
34
Wettest day (Rx1day)
118.9 mm (4.7 in)
1926
60.7 mm (2.4 in)
34
Wettest five days (Rx5day)
169.4 mm (6.7 in)
1924
91.1 mm (3.6 in)
34
Longest dry spell (CDD)
28 days
1934
18 days
34
Hottest day (TXx)
The hottest day of the year at Muncy Valley, 1909 to 1942. The record is 39.4 C (102.9 F) in 1930, marked on the chart; the median year is 35.0 C (95.0 F).
Hottest day (TXx) at Muncy Valley by year
Year
Hottest day (TXx)
1909
26.7 C (80.1 F)
1910
32.8 C (91.0 F)
1911
36.1 C (97.0 F)
1912
6.1 C (43.0 F)
1913
32.8 C (91.0 F)
1914
35.6 C (96.1 F)
1915
33.3 C (91.9 F)
1916
37.8 C (100.0 F)
1917
35.6 C (96.1 F)
1918
38.9 C (102.0 F)
1919
35.6 C (96.1 F)
1920
33.3 C (91.9 F)
1921
34.4 C (93.9 F)
1922
33.3 C (91.9 F)
1923
36.7 C (98.1 F)
1924
33.9 C (93.0 F)
1925
35.6 C (96.1 F)
1926
34.4 C (93.9 F)
1927
35.0 C (95.0 F)
1928
33.9 C (93.0 F)
1929
35.0 C (95.0 F)
1930
39.4 C (102.9 F)
1931
37.2 C (99.0 F)
1932
36.1 C (97.0 F)
1933
36.7 C (98.1 F)
1934
36.7 C (98.1 F)
1935
33.3 C (91.9 F)
1936
38.3 C (100.9 F)
1937
35.0 C (95.0 F)
1938
34.4 C (93.9 F)
1939
33.9 C (93.0 F)
1940
34.4 C (93.9 F)
1941
35.6 C (96.1 F)
1942
17.8 C (64.0 F)
Coldest night (TNn)
The coldest night of the year at Muncy Valley, 1909 to 1942. The record is -30.6 C (-23.1 F) in 1934, marked on the chart; the median year is -23.3 C (-9.9 F).
Coldest night (TNn) at Muncy Valley by year
Year
Coldest night (TNn)
1909
-21.7 C (-7.1 F)
1910
-22.2 C (-8.0 F)
1911
-16.1 C (3.0 F)
1912
-28.3 C (-18.9 F)
1913
-18.3 C (-0.9 F)
1914
-27.8 C (-18.0 F)
1915
-22.8 C (-9.0 F)
1916
-27.8 C (-18.0 F)
1917
-28.9 C (-20.0 F)
1918
-29.4 C (-20.9 F)
1919
-24.4 C (-11.9 F)
1920
-26.1 C (-15.0 F)
1921
-20.6 C (-5.1 F)
1922
-26.1 C (-15.0 F)
1923
-23.3 C (-9.9 F)
1924
-23.3 C (-9.9 F)
1925
-25.6 C (-14.1 F)
1926
-25.6 C (-14.1 F)
1927
-23.3 C (-9.9 F)
1928
-18.3 C (-0.9 F)
1929
-21.7 C (-7.1 F)
1930
-26.1 C (-15.0 F)
1931
-21.7 C (-7.1 F)
1932
-23.3 C (-9.9 F)
1933
-26.1 C (-15.0 F)
1934
-30.6 C (-23.1 F)
1935
-24.4 C (-11.9 F)
1936
-28.9 C (-20.0 F)
1937
-17.8 C (0.0 F)
1938
-22.8 C (-9.0 F)
1939
-23.3 C (-9.9 F)
1940
-22.2 C (-8.0 F)
1941
-20.6 C (-5.1 F)
1942
-30.0 C (-22.0 F)
Wettest day (Rx1day)
The wettest day of the year at Muncy Valley, 1909 to 1942. The record is 118.9 mm (4.7 in) in 1926, marked on the chart; the median year is 60.7 mm (2.4 in).
Wettest day (Rx1day) at Muncy Valley by year
Year
Wettest day (Rx1day)
1909
54.6 mm (2.1 in)
1910
61.7 mm (2.4 in)
1911
58.7 mm (2.3 in)
1912
13.5 mm (0.5 in)
1913
54.4 mm (2.1 in)
1914
49.3 mm (1.9 in)
1915
63.0 mm (2.5 in)
1916
51.8 mm (2.0 in)
1917
59.7 mm (2.4 in)
1918
62.2 mm (2.4 in)
1919
81.3 mm (3.2 in)
1920
57.9 mm (2.3 in)
1921
52.3 mm (2.1 in)
1922
76.7 mm (3.0 in)
1923
69.3 mm (2.7 in)
1924
103.6 mm (4.1 in)
1925
50.0 mm (2.0 in)
1926
118.9 mm (4.7 in)
1927
62.2 mm (2.4 in)
1928
57.7 mm (2.3 in)
1929
92.7 mm (3.6 in)
1930
40.6 mm (1.6 in)
1931
40.1 mm (1.6 in)
1932
83.3 mm (3.3 in)
1933
92.2 mm (3.6 in)
1934
64.5 mm (2.5 in)
1935
93.2 mm (3.7 in)
1936
54.9 mm (2.2 in)
1937
73.4 mm (2.9 in)
1938
56.4 mm (2.2 in)
1939
86.4 mm (3.4 in)
1940
95.8 mm (3.8 in)
1941
50.3 mm (2.0 in)
1942
48.5 mm (1.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Muncy Valley, 1909 to 1942. The record is 169.4 mm (6.7 in) in 1924, marked on the chart; the median year is 91.1 mm (3.6 in).
Wettest five days (Rx5day) at Muncy Valley by year
Year
Wettest five days (Rx5day)
1909
54.6 mm (2.1 in)
1910
115.0 mm (4.5 in)
1911
97.6 mm (3.8 in)
1912
13.5 mm (0.5 in)
1913
67.4 mm (2.7 in)
1914
85.9 mm (3.4 in)
1915
82.6 mm (3.3 in)
1916
69.1 mm (2.7 in)
1917
70.6 mm (2.8 in)
1918
64.7 mm (2.5 in)
1919
125.0 mm (4.9 in)
1920
78.8 mm (3.1 in)
1921
70.4 mm (2.8 in)
1922
114.0 mm (4.5 in)
1923
100.9 mm (4.0 in)
1924
169.4 mm (6.7 in)
1925
93.8 mm (3.7 in)
1926
145.8 mm (5.7 in)
1927
90.4 mm (3.6 in)
1928
91.7 mm (3.6 in)
1929
119.6 mm (4.7 in)
1930
51.2 mm (2.0 in)
1931
87.6 mm (3.4 in)
1932
155.4 mm (6.1 in)
1933
138.7 mm (5.5 in)
1934
96.0 mm (3.8 in)
1935
103.9 mm (4.1 in)
1936
89.2 mm (3.5 in)
1937
109.0 mm (4.3 in)
1938
69.9 mm (2.8 in)
1939
129.1 mm (5.1 in)
1940
138.7 mm (5.5 in)
1941
77.5 mm (3.1 in)
1942
48.5 mm (1.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Muncy Valley, 1909 to 1942. The record is 28 days in 1934, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Muncy Valley by year
Year
Longest dry spell (CDD)
1909
13 days
1910
22 days
1911
19 days
1912
11 days
1913
12 days
1914
15 days
1915
14 days
1916
13 days
1917
21 days
1918
19 days
1919
19 days
1920
25 days
1921
14 days
1922
24 days
1923
22 days
1924
23 days
1925
13 days
1926
18 days
1927
18 days
1928
14 days
1929
14 days
1930
22 days
1931
12 days
1932
19 days
1933
13 days
1934
28 days
1935
19 days
1936
25 days
1937
11 days
1938
13 days
1939
23 days
1940
16 days
1941
21 days
1942
14 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
24 years with a frost
Across 24 years with a frost, the median last spring frost at Muncy Valley falls on 20 May and the median first autumn frost on 25 September, which leaves a median of 122 days between them.
Frost dates and growing season at Muncy Valley
Measure
Median, all years
Earliest period
Recent period (1910 to 1939)
Recent against earliest
Fitted trend
Last spring frost
20 May
n/a
20 May
n/a
n/a
First autumn frost
25 September
n/a
25 September
n/a
n/a
Growing days
122 days
n/a
122 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.
Download the Data
Data for Muncy Valley standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Muncy Valley 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.