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Built 2026-10-16 (16 October 2026)

Helena 1 S Weather Records (USC00013783)

Record envelope, standing records and threshold days for Helena 1 S (USC00013783), Alabama, United States, with 52 years of record.

Key Facts for Helena 1 S

  • Helena 1 S (USC00013783) is a weather station in Alabama, United States at 33.28 latitude and -86.85 longitude, 127 m (416 ft) above sea level.
  • The station reports from 1900 to 1951, 52 years of record.
  • 0 records set at Helena 1 S still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Helena 1 S set a daily record precipitation of 50.8 mm (2.0 in) on 1 July 1951.

About the Station

  • Location: Alabama, United States, 33.28 latitude, -86.85 longitude.
  • Elevation: 127 m (416 ft).
  • Period of record: 1900 to 1951, 52 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Helena 1 S, with 2026 drawn through them The band shows the record high and record low for each calendar day at Helena 1 S. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 000111 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Helena 1 S. 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 Helena 1 S, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
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Which Years Hold Standing Records

0 standing records
Standing records at Helena 1 S by the year they were set 0 records at Helena 1 S still stand. 00000000000
0 records at Helena 1 S still stand.
Standing records at Helena 1 S by the year they were set
Year setStanding records

Wettest Day of Each Month

Dec: 248.9 mm (9.8 in)
Record daily precipitation for each month at Helena 1 S The wettest day on record for each calendar month at Helena 1 S. The most was 248.9 mm (9.8 in) on 28 December 1942. 0100200300 Jan: 113.0 mm (4.4 in), 5 January 1949 Jan Feb: 152.4 mm (6.0 in), 7 February 1903 Feb Mar: 134.6 mm (5.3 in), 29 March 1951 Mar Apr: 130.6 mm (5.1 in), 8 April 1938 Apr May: 114.3 mm (4.5 in), 12 May 1945 May Jun: 114.3 mm (4.5 in), 13 June 1942 Jun Jul: 56.6 mm (2.2 in), 13 July 1950 Jul Aug: 88.9 mm (3.5 in), 13 August 1901 Aug Sep: 67.3 mm (2.6 in), 4 September 1932 Sep Oct: 143.5 mm (5.6 in), 30 October 1940 Oct Nov: 154.4 mm (6.1 in), 12 November 1929 Nov Dec: 248.9 mm (9.8 in), 28 December 1942 Dec
The wettest day on record for each calendar month at Helena 1 S. The most was 248.9 mm (9.8 in) on 28 December 1942.
Record daily precipitation for each month at Helena 1 S
MonthRecord daily precipitation (mm)Date
Jan113.0 mm (4.4 in)5 January 1949
Feb152.4 mm (6.0 in)7 February 1903
Mar134.6 mm (5.3 in)29 March 1951
Apr130.6 mm (5.1 in)8 April 1938
May114.3 mm (4.5 in)12 May 1945
Jun114.3 mm (4.5 in)13 June 1942
Jul56.6 mm (2.2 in)13 July 1950
Aug88.9 mm (3.5 in)13 August 1901
Sep67.3 mm (2.6 in)4 September 1932
Oct143.5 mm (5.6 in)30 October 1940
Nov154.4 mm (6.1 in)12 November 1929
Dec248.9 mm (9.8 in)28 December 1942

Latest Records

20
Latest records at Helena 1 S
DateStationRecordValueBeat old record byOld record stoodSignificance
1 July 1951Helena 1 S, USdaily rain50.8 mm (2.0 in)3.0 mm (0.12 in)20 years13 of 100 (Routine)
30 June 1951Helena 1 S, USdaily rain50.8 mm (2.0 in)23.1 mm (0.9 in)32 years29 of 100 (Routine)
31 May 1951Helena 1 S, USdaily rain38.9 mm (1.5 in)10.5 mm (0.4 in)12 years14 of 100 (Routine)
4 May 1951Helena 1 S, USdaily rain26.7 mm (1.1 in)0.5 mm (0.02 in)28 years13 of 100 (Routine)
20 April 1951Helena 1 S, USdaily rain27.2 mm (1.1 in)10.2 mm (0.4 in)6 years12 of 100 (Routine)
29 March 1951Helena 1 S, USmonthly rain134.6 mm (5.3 in)20.3 mm (0.8 in)18 years30 of 100 (Routine)
1 February 1951Helena 1 S, USdaily rain35.3 mm (1.4 in)17.5 mm (0.7 in)16 years19 of 100 (Routine)
21 November 1950Helena 1 S, USdaily rain14.0 mm (0.6 in)4.3 mm (0.17 in)8 years9 of 100 (Routine)
23 October 1950Helena 1 S, USdaily rain61.2 mm (2.4 in)21.3 mm (0.8 in)31 years23 of 100 (Routine)
18 September 1950Helena 1 S, USdaily rain26.4 mm (1.0 in)6.8 mm (0.27 in)25 years17 of 100 (Routine)
7 September 1950Helena 1 S, USdaily rain35.1 mm (1.4 in)15.8 mm (0.6 in)48 years31 of 100 (Routine)
31 August 1950Helena 1 S, USdaily rain57.9 mm (2.3 in)16.0 mm (0.6 in)0 years16 of 100 (Routine)
31 July 1950Helena 1 S, USdaily rain33.8 mm (1.3 in)9.7 mm (0.38 in)24 years20 of 100 (Routine)
28 July 1950Helena 1 S, USdaily rain38.4 mm (1.5 in)9.2 mm (0.36 in)7 years15 of 100 (Routine)
13 July 1950Helena 1 S, USmonthly rain56.6 mm (2.2 in)0.2 mm (0.01 in)8 years17 of 100 (Routine)
12 July 1950Helena 1 S, USdaily rain50.8 mm (2.0 in)5.1 mm (0.20 in)4 years10 of 100 (Routine)
21 June 1950Helena 1 S, USdaily rain33.8 mm (1.3 in)16.0 mm (0.6 in)23 years21 of 100 (Routine)
4 June 1950Helena 1 S, USdaily rain59.7 mm (2.4 in)22.4 mm (0.9 in)21 years26 of 100 (Routine)
3 May 1950Helena 1 S, USdaily rain45.0 mm (1.8 in)19.1 mm (0.8 in)24 years24 of 100 (Routine)
13 March 1950Helena 1 S, USdaily rain40.9 mm (1.6 in)6.1 mm (0.24 in)3 years8 of 100 (Routine)

Extremes by Year

1900 to 1951
Yearly extremes at Helena 1 S: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)248.9 mm (9.8 in)194281.3 mm (3.2 in)39
Wettest five days (Rx5day)376.6 mm (14.8 in)1929132.6 mm (5.2 in)39
Longest dry spell (CDD)53 days192421 days39

Wettest day (Rx1day)

Wettest day (Rx1day) at Helena 1 S by year The wettest day of the year at Helena 1 S, 1900 to 1951. The record is 248.9 mm (9.8 in) in 1942, marked on the chart; the median year is 81.3 mm (3.2 in). 050100150200250190019101920193019401950Record: 248.9 mm (9.8 in) in 1942
The wettest day of the year at Helena 1 S, 1900 to 1951. The record is 248.9 mm (9.8 in) in 1942, marked on the chart; the median year is 81.3 mm (3.2 in).
Wettest day (Rx1day) at Helena 1 S by year
YearWettest day (Rx1day)
190049.5 mm (1.9 in)
190188.9 mm (3.5 in)
190276.5 mm (3.0 in)
1903152.4 mm (6.0 in)
191783.8 mm (3.3 in)
1918130.6 mm (5.1 in)
1919112.5 mm (4.4 in)
192078.7 mm (3.1 in)
192176.2 mm (3.0 in)
192257.2 mm (2.3 in)
192361.0 mm (2.4 in)
192476.5 mm (3.0 in)
192581.3 mm (3.2 in)
192671.1 mm (2.8 in)
192767.3 mm (2.6 in)
192875.7 mm (3.0 in)
1929154.4 mm (6.1 in)
193092.7 mm (3.6 in)
193170.6 mm (2.8 in)
1932114.3 mm (4.5 in)
193373.7 mm (2.9 in)
1934102.9 mm (4.1 in)
193561.0 mm (2.4 in)
1936125.2 mm (4.9 in)
193762.2 mm (2.4 in)
1938130.6 mm (5.1 in)
193980.0 mm (3.1 in)
1940143.5 mm (5.6 in)
194164.8 mm (2.6 in)
1942248.9 mm (9.8 in)
1943101.6 mm (4.0 in)
194488.9 mm (3.5 in)
1945114.3 mm (4.5 in)
194663.5 mm (2.5 in)
194763.5 mm (2.5 in)
1948133.1 mm (5.2 in)
1949113.0 mm (4.4 in)
195061.2 mm (2.4 in)
1951134.6 mm (5.3 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Helena 1 S by year The wettest five days of the year at Helena 1 S, 1900 to 1951. The record is 376.6 mm (14.8 in) in 1929, marked on the chart; the median year is 132.6 mm (5.2 in). 0100200300400190019101920193019401950Record: 376.6 mm (14.8 in) in 1929
The wettest five days of the year at Helena 1 S, 1900 to 1951. The record is 376.6 mm (14.8 in) in 1929, marked on the chart; the median year is 132.6 mm (5.2 in).
Wettest five days (Rx5day) at Helena 1 S by year
YearWettest five days (Rx5day)
1900104.1 mm (4.1 in)
1901124.5 mm (4.9 in)
190277.0 mm (3.0 in)
1903191.0 mm (7.5 in)
1917172.8 mm (6.8 in)
1918206.8 mm (8.1 in)
1919222.5 mm (8.8 in)
1920117.7 mm (4.6 in)
1921132.6 mm (5.2 in)
1922102.4 mm (4.0 in)
1923127.1 mm (5.0 in)
1924111.1 mm (4.4 in)
1925112.3 mm (4.4 in)
1926125.5 mm (4.9 in)
1927116.6 mm (4.6 in)
1928171.5 mm (6.8 in)
1929376.6 mm (14.8 in)
1930141.5 mm (5.6 in)
1931110.0 mm (4.3 in)
1932129.9 mm (5.1 in)
1933118.9 mm (4.7 in)
1934210.5 mm (8.3 in)
193593.4 mm (3.7 in)
1936160.0 mm (6.3 in)
1937125.4 mm (4.9 in)
1938188.5 mm (7.4 in)
1939237.2 mm (9.3 in)
1940160.7 mm (6.3 in)
194195.3 mm (3.8 in)
1942257.3 mm (10.1 in)
1943253.5 mm (10.0 in)
1944126.9 mm (5.0 in)
1945202.0 mm (8.0 in)
1946101.1 mm (4.0 in)
194783.4 mm (3.3 in)
1948194.5 mm (7.7 in)
1949156.2 mm (6.1 in)
1950133.3 mm (5.2 in)
1951182.6 mm (7.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Helena 1 S by year The longest dry spell of the year at Helena 1 S, 1900 to 1951. The record is 53 days in 1924, marked on the chart; the median year is 21 days. 102030405060190019101920193019401950Record: 53 days in 1924
The longest dry spell of the year at Helena 1 S, 1900 to 1951. The record is 53 days in 1924, marked on the chart; the median year is 21 days.
Longest dry spell (CDD) at Helena 1 S by year
YearLongest dry spell (CDD)
190033 days
190119 days
190229 days
190320 days
191726 days
191826 days
191914 days
192031 days
192124 days
192216 days
192325 days
192453 days
192524 days
192614 days
192720 days
192815 days
192914 days
193021 days
193124 days
193218 days
193330 days
193420 days
193521 days
193618 days
193720 days
193821 days
193924 days
194014 days
194125 days
194224 days
194321 days
194427 days
194518 days
194621 days
194720 days
194821 days
194921 days
195020 days
195118 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.

Rainfall Return Levels

30 years, 1917 to 1950

A day with at least 83.9 mm (3.3 in) of rain is expected about once in 2 years. A day with at least 264.7 mm (10.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Helena 1 S: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years83.9 mm (3.3 in)
5 years113.9 mm (4.5 in)
10 years139.5 mm (5.5 in)
25 years180.5 mm (7.1 in)
50 years218.7 mm (8.6 in)Longer than the 30 years of record
100 years264.7 mm (10.4 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 1917 to 1950.

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: 248.9 mm (9.8 in) in 1942; 154.4 mm (6.1 in) in 1929; 143.5 mm (5.6 in) in 1940.

Download the Data

  • Data for Helena 1 S standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Helena 1 S 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.

Data as of . Last revised (2025-12-31).