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Data as of 2025-12-31
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Built 2026-10-16 (16 October 2026)

Hamilton Weather Records (USC00053738)

Record envelope, standing records and threshold days for Hamilton (USC00053738), Colorado, United States, with 61 years of record.

Key Facts for Hamilton

  • Hamilton (USC00053738) is a weather station in Colorado, United States at 40.37 latitude and -107.61 longitude, 1,899 m (6,230 ft) above sea level.
  • The station reports from 1947 to 2007, 61 years of record.
  • 0 records set at Hamilton still stand.
  • Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Hamilton set a daily record precipitation of 15.2 mm (0.6 in) on 28 February 2007.

About the Station

  • Location: Colorado, United States, 40.37 latitude, -107.61 longitude.
  • Elevation: 1,899 m (6,230 ft).
  • Period of record: 1947 to 2007, 61 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 Hamilton, with 2026 drawn through them The band shows the record high and record low for each calendar day at Hamilton. 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 Hamilton. 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 Hamilton, 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 Hamilton by the year they were set 0 records at Hamilton still stand. 00000000000
0 records at Hamilton still stand.
Standing records at Hamilton by the year they were set
Year setStanding records

All-Time Record Progression

1 new records
When Hamilton set new all-time records 1 all-time records were set at Hamilton between 16 September 2006 and 16 September 2006. Each dot is a new record. Record daily precipitation16 September 2006: Record daily precipitation 67.3 mm (2.6 in)
1 all-time records were set at Hamilton between 16 September 2006 and 16 September 2006. Each dot is a new record.
When Hamilton set new all-time records
DateKindDetail
2006-09-16Record daily precipitationRecord daily precipitation 67.3 mm (2.6 in)

Wettest Day of Each Month

Sep: 67.3 mm (2.6 in)
Record daily precipitation for each month at Hamilton The wettest day on record for each calendar month at Hamilton. The most was 67.3 mm (2.6 in) on 16 September 2006. 020406080 Jan: 25.4 mm (1.0 in), 24 January 1950 Jan Feb: 38.1 mm (1.5 in), 19 February 1986 Feb Mar: 39.4 mm (1.6 in), 26 March 2005 Mar Apr: 51.1 mm (2.0 in), 28 April 1950 Apr May: 38.1 mm (1.5 in), 18 May 1988 May Jun: 36.8 mm (1.4 in), 11 June 1970 Jun Jul: 53.8 mm (2.1 in), 1 July 1982 Jul Aug: 36.8 mm (1.4 in), 12 August 1967 Aug Sep: 67.3 mm (2.6 in), 16 September 2006 Sep Oct: 59.2 mm (2.3 in), 3 October 1966 Oct Nov: 39.4 mm (1.6 in), 23 November 2001 Nov Dec: 50.8 mm (2.0 in), 30 December 1951 Dec
The wettest day on record for each calendar month at Hamilton. The most was 67.3 mm (2.6 in) on 16 September 2006.
Record daily precipitation for each month at Hamilton
MonthRecord daily precipitation (mm)Date
Jan25.4 mm (1.0 in)24 January 1950
Feb38.1 mm (1.5 in)19 February 1986
Mar39.4 mm (1.6 in)26 March 2005
Apr51.1 mm (2.0 in)28 April 1950
May38.1 mm (1.5 in)18 May 1988
Jun36.8 mm (1.4 in)11 June 1970
Jul53.8 mm (2.1 in)1 July 1982
Aug36.8 mm (1.4 in)12 August 1967
Sep67.3 mm (2.6 in)16 September 2006
Oct59.2 mm (2.3 in)3 October 1966
Nov39.4 mm (1.6 in)23 November 2001
Dec50.8 mm (2.0 in)30 December 1951

Latest Records

20
Latest records at Hamilton
DateStationRecordValueBeat old record byOld record stoodSignificance
28 February 2007Hamilton, USdaily rain15.2 mm (0.6 in)2.5 mm (0.10 in)56 years20 of 100 (Routine)
13 January 2007Hamilton, USdaily rain12.7 mm (0.5 in)6.3 mm (0.25 in)5 years20 of 100 (Routine)
12 January 2007Hamilton, USdaily rain16.5 mm (0.6 in)0.8 mm (0.03 in)1 year7 of 100 (Routine)
5 January 2007Hamilton, USdaily rain14.7 mm (0.6 in)5.3 mm (0.21 in)11 years20 of 100 (Routine)
29 November 2006Hamilton, USdaily rain7.6 mm (0.30 in)1.8 mm (0.07 in)13 years12 of 100 (Routine)
26 October 2006Hamilton, USdaily rain19.6 mm (0.8 in)3.6 mm (0.14 in)55 years20 of 100 (Routine)
16 September 2006Hamilton, USall-time rain67.3 mm (2.6 in)8.1 mm (0.32 in)39 years49 of 100 (Notable)
8 July 2006Hamilton, USdaily rain19.1 mm (0.8 in)10.2 mm (0.4 in)39 years20 of 100 (Routine)
1 March 2006Hamilton, USdaily rain11.9 mm (0.5 in)1.7 mm (0.07 in)33 years19 of 100 (Routine)
2 February 2006Hamilton, USdaily rain10.7 mm (0.4 in)1.6 mm (0.06 in)42 years20 of 100 (Routine)
19 January 2006Hamilton, USdaily rain (Tie)7.6 mm (0.30 in)tie6 years1 of 100 (Routine)
5 October 2005Hamilton, USdaily rain37.6 mm (1.5 in)19.3 mm (0.8 in)56 years48 of 100 (Notable)
9 August 2005Hamilton, USdaily rain11.7 mm (0.5 in)0.3 mm (0.01 in)36 years16 of 100 (Routine)
3 June 2005Hamilton, USdaily rain27.4 mm (1.1 in)5.6 mm (0.22 in)52 years30 of 100 (Routine)
29 April 2005Hamilton, USdaily rain25.4 mm (1.0 in)3.3 mm (0.13 in)43 years22 of 100 (Routine)
26 March 2005Hamilton, USmonthly rain39.4 mm (1.6 in)2.1 mm (0.08 in)56 years35 of 100 (Notable)
8 February 2005Hamilton, USdaily rain17.8 mm (0.7 in)3.8 mm (0.15 in)20 years19 of 100 (Routine)
12 January 2005Hamilton, USdaily rain15.7 mm (0.6 in)3.5 mm (0.14 in)55 years20 of 100 (Routine)
28 November 2004Hamilton, USdaily rain15.2 mm (0.6 in)0.5 mm (0.02 in)33 years14 of 100 (Routine)
8 April 2004Hamilton, USdaily rain19.1 mm (0.8 in)3.6 mm (0.14 in)10 years14 of 100 (Routine)

Extremes by Year

1947 to 2007
Yearly extremes at Hamilton: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)67.3 mm (2.6 in)200625.9 mm (1.0 in)61
Wettest five days (Rx5day)121.6 mm (4.8 in)199751.0 mm (2.0 in)61
Longest dry spell (CDD)63 days197126 days61

Wettest day (Rx1day)

Wettest day (Rx1day) at Hamilton by year The wettest day of the year at Hamilton, 1947 to 2007. The record is 67.3 mm (2.6 in) in 2006, marked on the chart; the median year is 25.9 mm (1.0 in). 020406080195019601970198019902000Record: 67.3 mm (2.6 in) in 2006
The wettest day of the year at Hamilton, 1947 to 2007. The record is 67.3 mm (2.6 in) in 2006, marked on the chart; the median year is 25.9 mm (1.0 in).
Wettest day (Rx1day) at Hamilton by year
YearWettest day (Rx1day)
194716.5 mm (0.6 in)
194824.6 mm (1.0 in)
194937.3 mm (1.5 in)
195051.1 mm (2.0 in)
195150.8 mm (2.0 in)
195221.8 mm (0.9 in)
195325.9 mm (1.0 in)
195427.4 mm (1.1 in)
195531.2 mm (1.2 in)
195624.4 mm (1.0 in)
195721.3 mm (0.8 in)
195820.1 mm (0.8 in)
195922.9 mm (0.9 in)
196020.3 mm (0.8 in)
196138.1 mm (1.5 in)
196222.1 mm (0.9 in)
196320.3 mm (0.8 in)
196433.0 mm (1.3 in)
196519.8 mm (0.8 in)
196659.2 mm (2.3 in)
196736.8 mm (1.4 in)
196820.3 mm (0.8 in)
196924.6 mm (1.0 in)
197036.8 mm (1.4 in)
197129.2 mm (1.1 in)
197222.1 mm (0.9 in)
197322.9 mm (0.9 in)
197429.2 mm (1.1 in)
197519.1 mm (0.8 in)
197617.8 mm (0.7 in)
197726.7 mm (1.1 in)
197816.8 mm (0.7 in)
197939.6 mm (1.6 in)
198035.1 mm (1.4 in)
198125.4 mm (1.0 in)
198253.8 mm (2.1 in)
198324.1 mm (0.9 in)
198425.4 mm (1.0 in)
198542.7 mm (1.7 in)
198638.1 mm (1.5 in)
198726.7 mm (1.1 in)
198838.1 mm (1.5 in)
198922.9 mm (0.9 in)
199022.9 mm (0.9 in)
199119.1 mm (0.8 in)
199231.8 mm (1.3 in)
199327.2 mm (1.1 in)
199421.6 mm (0.9 in)
199530.5 mm (1.2 in)
199622.9 mm (0.9 in)
199744.7 mm (1.8 in)
199830.5 mm (1.2 in)
199924.1 mm (0.9 in)
200029.2 mm (1.1 in)
200139.4 mm (1.6 in)
200221.6 mm (0.9 in)
200320.3 mm (0.8 in)
200441.7 mm (1.6 in)
200539.4 mm (1.6 in)
200667.3 mm (2.6 in)
200716.5 mm (0.6 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Hamilton by year The wettest five days of the year at Hamilton, 1947 to 2007. The record is 121.6 mm (4.8 in) in 1997, marked on the chart; the median year is 51.0 mm (2.0 in). 255075100125195019601970198019902000Record: 121.6 mm (4.8 in) in 1997
The wettest five days of the year at Hamilton, 1947 to 2007. The record is 121.6 mm (4.8 in) in 1997, marked on the chart; the median year is 51.0 mm (2.0 in).
Wettest five days (Rx5day) at Hamilton by year
YearWettest five days (Rx5day)
194730.4 mm (1.2 in)
194861.4 mm (2.4 in)
194963.4 mm (2.5 in)
195054.9 mm (2.2 in)
195176.2 mm (3.0 in)
195276.2 mm (3.0 in)
195335.0 mm (1.4 in)
195438.9 mm (1.5 in)
195551.0 mm (2.0 in)
195634.3 mm (1.4 in)
195760.0 mm (2.4 in)
195827.5 mm (1.1 in)
195959.5 mm (2.3 in)
196034.0 mm (1.3 in)
196172.1 mm (2.8 in)
196238.3 mm (1.5 in)
196331.0 mm (1.2 in)
196457.2 mm (2.3 in)
196545.1 mm (1.8 in)
196659.2 mm (2.3 in)
196757.9 mm (2.3 in)
196845.2 mm (1.8 in)
196951.3 mm (2.0 in)
197078.9 mm (3.1 in)
197147.0 mm (1.9 in)
197243.7 mm (1.7 in)
197357.2 mm (2.3 in)
197453.9 mm (2.1 in)
197541.2 mm (1.6 in)
197638.1 mm (1.5 in)
197740.4 mm (1.6 in)
197835.8 mm (1.4 in)
197945.7 mm (1.8 in)
198061.8 mm (2.4 in)
198153.6 mm (2.1 in)
198253.8 mm (2.1 in)
198369.3 mm (2.7 in)
198452.6 mm (2.1 in)
1985120.4 mm (4.7 in)
198652.1 mm (2.1 in)
198734.3 mm (1.4 in)
198857.2 mm (2.3 in)
198929.2 mm (1.1 in)
199044.6 mm (1.8 in)
199146.0 mm (1.8 in)
199237.6 mm (1.5 in)
199345.0 mm (1.8 in)
199440.7 mm (1.6 in)
199560.0 mm (2.4 in)
199636.9 mm (1.5 in)
1997121.6 mm (4.8 in)
199854.6 mm (2.1 in)
199959.8 mm (2.4 in)
200038.1 mm (1.5 in)
200171.1 mm (2.8 in)
200230.5 mm (1.2 in)
200336.8 mm (1.4 in)
200448.6 mm (1.9 in)
200557.7 mm (2.3 in)
200667.3 mm (2.6 in)
200732.4 mm (1.3 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Hamilton by year The longest dry spell of the year at Hamilton, 1947 to 2007. The record is 63 days in 1971, marked on the chart; the median year is 26 days. 020406080195019601970198019902000Record: 63 days in 1971
The longest dry spell of the year at Hamilton, 1947 to 2007. The record is 63 days in 1971, marked on the chart; the median year is 26 days.
Longest dry spell (CDD) at Hamilton by year
YearLongest dry spell (CDD)
194715 days
194821 days
194928 days
195031 days
195126 days
195246 days
195344 days
195425 days
195529 days
195657 days
195721 days
195824 days
195926 days
196025 days
196144 days
196237 days
196328 days
196433 days
196525 days
196631 days
196722 days
196826 days
196922 days
197022 days
197163 days
197240 days
197339 days
197439 days
197526 days
197628 days
197730 days
197831 days
197937 days
198028 days
198119 days
198221 days
198323 days
198420 days
198531 days
198622 days
198726 days
198822 days
198930 days
199022 days
199134 days
199231 days
199327 days
199430 days
199524 days
199629 days
199732 days
199824 days
199921 days
200028 days
200125 days
200228 days
200322 days
200424 days
200526 days
200619 days
200719 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

57 years, 1948 to 2006

A day with at least 27.3 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 75.1 mm (3.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Hamilton: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years27.3 mm (1.1 in)
5 years36.5 mm (1.4 in)
10 years43.8 mm (1.7 in)
25 years54.8 mm (2.2 in)
50 years64.3 mm (2.5 in)
100 years75.1 mm (3.0 in)Longer than the 57 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, 57 years of values from 1948 to 2006.

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: 67.3 mm (2.6 in) in 2006; 59.2 mm (2.3 in) in 1966; 53.8 mm (2.1 in) in 1982.

Download the Data

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