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Built 2026-10-15 (15 October 2026)

Derby 1 S Weather Records (USC00412417)

Record envelope, standing records and threshold days for Derby 1 S (USC00412417), Texas, United States, with 39 years of record.

Key Facts for Derby 1 S

  • Derby 1 S (USC00412417) is a weather station in Texas, United States at 28.75 latitude and -99.14 longitude, 149 m (488 ft) above sea level.
  • The station reports from 1978 to 2016, 39 years of record.
  • 0 records set at Derby 1 S still stand.
  • Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Derby 1 S set a daily record precipitation of 14.2 mm (0.6 in) on 3 January 2016.

About the Station

  • Location: Texas, United States, 28.75 latitude, -99.14 longitude.
  • Elevation: 149 m (488 ft).
  • Period of record: 1978 to 2016, 39 years.
  • Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Derby 1 S, with 2026 drawn through them The band shows the record high and record low for each calendar day at Derby 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 Derby 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 Derby 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 Derby 1 S by the year they were set 0 records at Derby 1 S still stand. 00000000000
0 records at Derby 1 S still stand.
Standing records at Derby 1 S by the year they were set
Year setStanding records

Wettest Day of Each Month

May: 325.1 mm (12.8 in)
Record daily precipitation for each month at Derby 1 S The wettest day on record for each calendar month at Derby 1 S. The most was 325.1 mm (12.8 in) on 16 May 1980. 0100200300400 Jan: 56.9 mm (2.2 in), 9 January 2013 Jan Feb: 57.2 mm (2.3 in), 4 February 1991 Feb Mar: 76.2 mm (3.0 in), 14 March 1985 Mar Apr: 63.5 mm (2.5 in), 5 April 1991 Apr May: 325.1 mm (12.8 in), 16 May 1980 May Jun: 108.0 mm (4.3 in), 21 June 1997 Jun Jul: 126.0 mm (5.0 in), 4 July 2007 Jul Aug: 132.6 mm (5.2 in), 22 August 2004 Aug Sep: 263.4 mm (10.4 in), 9 September 2002 Sep Oct: 271.8 mm (10.7 in), 7 October 1981 Oct Nov: 53.3 mm (2.1 in), 5 November 2014 Nov Dec: 57.9 mm (2.3 in), 22 December 1986 Dec
The wettest day on record for each calendar month at Derby 1 S. The most was 325.1 mm (12.8 in) on 16 May 1980.
Record daily precipitation for each month at Derby 1 S
MonthRecord daily precipitation (mm)Date
Jan56.9 mm (2.2 in)9 January 2013
Feb57.2 mm (2.3 in)4 February 1991
Mar76.2 mm (3.0 in)14 March 1985
Apr63.5 mm (2.5 in)5 April 1991
May325.1 mm (12.8 in)16 May 1980
Jun108.0 mm (4.3 in)21 June 1997
Jul126.0 mm (5.0 in)4 July 2007
Aug132.6 mm (5.2 in)22 August 2004
Sep263.4 mm (10.4 in)9 September 2002
Oct271.8 mm (10.7 in)7 October 1981
Nov53.3 mm (2.1 in)5 November 2014
Dec57.9 mm (2.3 in)22 December 1986

Latest Records

20
Latest records at Derby 1 S
DateStationRecordValueBeat old record byOld record stoodSignificance
3 January 2016Derby 1 S, USdaily rain14.2 mm (0.6 in)5.8 mm (0.23 in)0 years8 of 100 (Routine)
2 January 2016Derby 1 S, USdaily rain19.8 mm (0.8 in)5.3 mm (0.21 in)16 years12 of 100 (Routine)
19 June 2015Derby 1 S, USdaily rain30.5 mm (1.2 in)10.2 mm (0.4 in)0 years7 of 100 (Routine)
17 May 2015Derby 1 S, USdaily rain53.3 mm (2.1 in)21.5 mm (0.8 in)5 years11 of 100 (Routine)
18 April 2015Derby 1 S, USdaily rain41.1 mm (1.6 in)8.1 mm (0.32 in)33 years19 of 100 (Routine)
12 April 2015Derby 1 S, USdaily rain4.3 mm (0.17 in)4.3 mm (0.17 in)36 years17 of 100 (Routine)
21 March 2015Derby 1 S, USdaily rain17.3 mm (0.7 in)15.8 mm (0.6 in)36 years20 of 100 (Routine)
22 January 2015Derby 1 S, USdaily rain14.5 mm (0.6 in)5.9 mm (0.23 in)8 years10 of 100 (Routine)
15 January 2015Derby 1 S, USdaily rain14.0 mm (0.6 in)8.9 mm (0.35 in)11 years14 of 100 (Routine)
3 January 2015Derby 1 S, USdaily rain8.4 mm (0.33 in)0.8 mm (0.03 in)24 years10 of 100 (Routine)
6 November 2014Derby 1 S, USdaily rain31.2 mm (1.2 in)9.9 mm (0.39 in)31 years20 of 100 (Routine)
5 November 2014Derby 1 S, USmonthly rain53.3 mm (2.1 in)1.7 mm (0.07 in)21 years20 of 100 (Routine)
27 September 2014Derby 1 S, USdaily rain10.7 mm (0.4 in)1.3 mm (0.05 in)33 years13 of 100 (Routine)
18 July 2014Derby 1 S, USdaily rain31.5 mm (1.2 in)27.9 mm (1.1 in)11 years18 of 100 (Routine)
19 June 2014Derby 1 S, USdaily rain20.3 mm (0.8 in)20.3 mm (0.8 in)36 years20 of 100 (Routine)
14 May 2014Derby 1 S, USdaily rain45.0 mm (1.8 in)0.5 mm (0.02 in)5 years4 of 100 (Routine)
10 March 2014Derby 1 S, USdaily rain15.2 mm (0.6 in)9.6 mm (0.38 in)1 year10 of 100 (Routine)
14 October 2013Derby 1 S, USdaily rain44.5 mm (1.8 in)3.9 mm (0.15 in)28 years12 of 100 (Routine)
30 September 2013Derby 1 S, USdaily rain64.0 mm (2.5 in)39.9 mm (1.6 in)6 years18 of 100 (Routine)
27 August 2013Derby 1 S, USdaily rain19.1 mm (0.8 in)14.0 mm (0.6 in)12 years11 of 100 (Routine)

Extremes by Year

1978 to 2016
Yearly extremes at Derby 1 S: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)325.1 mm (12.8 in)198064.0 mm (2.5 in)39
Wettest five days (Rx5day)421.4 mm (16.6 in)1980106.6 mm (4.2 in)39
Longest dry spell (CDD)141 days201152 days39

Wettest day (Rx1day)

Wettest day (Rx1day) at Derby 1 S by year The wettest day of the year at Derby 1 S, 1978 to 2016. The record is 325.1 mm (12.8 in) in 1980, marked on the chart; the median year is 64.0 mm (2.5 in). 01002003004001980199020002010Record: 325.1 mm (12.8 in) in 1980
The wettest day of the year at Derby 1 S, 1978 to 2016. The record is 325.1 mm (12.8 in) in 1980, marked on the chart; the median year is 64.0 mm (2.5 in).
Wettest day (Rx1day) at Derby 1 S by year
YearWettest day (Rx1day)
1978102.1 mm (4.0 in)
197991.4 mm (3.6 in)
1980325.1 mm (12.8 in)
1981271.8 mm (10.7 in)
198253.8 mm (2.1 in)
1983104.1 mm (4.1 in)
198459.7 mm (2.4 in)
198576.2 mm (3.0 in)
198663.8 mm (2.5 in)
198767.8 mm (2.7 in)
198851.6 mm (2.0 in)
198961.5 mm (2.4 in)
199081.5 mm (3.2 in)
199163.5 mm (2.5 in)
199251.6 mm (2.0 in)
1993106.2 mm (4.2 in)
199423.4 mm (0.9 in)
199545.0 mm (1.8 in)
199645.0 mm (1.8 in)
1997108.0 mm (4.3 in)
1998106.7 mm (4.2 in)
199969.9 mm (2.8 in)
200058.4 mm (2.3 in)
200150.8 mm (2.0 in)
2002263.4 mm (10.4 in)
2003115.3 mm (4.5 in)
2004132.6 mm (5.2 in)
200576.2 mm (3.0 in)
200661.0 mm (2.4 in)
2007126.0 mm (5.0 in)
200844.5 mm (1.8 in)
200960.2 mm (2.4 in)
201056.1 mm (2.2 in)
201176.2 mm (3.0 in)
2012156.2 mm (6.1 in)
201364.0 mm (2.5 in)
201453.3 mm (2.1 in)
201553.3 mm (2.1 in)
201619.8 mm (0.8 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Derby 1 S by year The wettest five days of the year at Derby 1 S, 1978 to 2016. The record is 421.4 mm (16.6 in) in 1980, marked on the chart; the median year is 106.6 mm (4.2 in). 01002003004005001980199020002010Record: 421.4 mm (16.6 in) in 1980
The wettest five days of the year at Derby 1 S, 1978 to 2016. The record is 421.4 mm (16.6 in) in 1980, marked on the chart; the median year is 106.6 mm (4.2 in).
Wettest five days (Rx5day) at Derby 1 S by year
YearWettest five days (Rx5day)
1978152.4 mm (6.0 in)
1979195.0 mm (7.7 in)
1980421.4 mm (16.6 in)
1981274.8 mm (10.8 in)
198289.9 mm (3.5 in)
1983104.1 mm (4.1 in)
1984137.1 mm (5.4 in)
1985116.6 mm (4.6 in)
1986128.3 mm (5.1 in)
1987124.7 mm (4.9 in)
198876.2 mm (3.0 in)
1989119.4 mm (4.7 in)
1990156.9 mm (6.2 in)
199198.0 mm (3.9 in)
199286.4 mm (3.4 in)
1993108.7 mm (4.3 in)
199427.4 mm (1.1 in)
199571.7 mm (2.8 in)
199672.5 mm (2.9 in)
1997108.0 mm (4.3 in)
1998175.3 mm (6.9 in)
199969.9 mm (2.8 in)
2000106.6 mm (4.2 in)
200181.3 mm (3.2 in)
2002390.4 mm (15.4 in)
2003133.4 mm (5.3 in)
2004213.8 mm (8.4 in)
200597.0 mm (3.8 in)
200664.0 mm (2.5 in)
2007181.0 mm (7.1 in)
200852.6 mm (2.1 in)
200978.5 mm (3.1 in)
201076.4 mm (3.0 in)
201176.2 mm (3.0 in)
2012197.4 mm (7.8 in)
201364.0 mm (2.5 in)
201484.5 mm (3.3 in)
2015111.8 mm (4.4 in)
201639.8 mm (1.6 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Derby 1 S by year The longest dry spell of the year at Derby 1 S, 1978 to 2016. The record is 141 days in 2011, marked on the chart; the median year is 52 days. 0501001501980199020002010Record: 141 days in 2011
The longest dry spell of the year at Derby 1 S, 1978 to 2016. The record is 141 days in 2011, marked on the chart; the median year is 52 days.
Longest dry spell (CDD) at Derby 1 S by year
YearLongest dry spell (CDD)
197831 days
197974 days
198071 days
198151 days
198264 days
198337 days
198444 days
198563 days
198644 days
198733 days
198841 days
198941 days
199052 days
199135 days
199236 days
199359 days
19947 days
199526 days
199660 days
199762 days
199870 days
199975 days
200042 days
200170 days
200233 days
200354 days
200438 days
200548 days
200689 days
200753 days
200876 days
200970 days
201052 days
2011141 days
201249 days
201361 days
201457 days
201536 days
201623 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

32 years, 1979 to 2015

A day with at least 69.1 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 386.0 mm (15.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Derby 1 S: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years69.1 mm (2.7 in)
5 years103.1 mm (4.1 in)
10 years138.4 mm (5.4 in)
25 years206.2 mm (8.1 in)
50 years281.2 mm (11.1 in)Longer than the 32 years of record
100 years386.0 mm (15.2 in)Longer than the 32 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, 32 years of values from 1979 to 2015.

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: 325.1 mm (12.8 in) in 1980; 271.8 mm (10.7 in) in 1981; 156.2 mm (6.1 in) in 2012.

Download the Data

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