Rocky Rvr Dam Weather Records (USC00066966)
Record envelope, standing records and threshold days for Rocky Rvr Dam (USC00066966), Connecticut, United States, with 67 years of record.
Key Facts for Rocky Rvr Dam
- Rocky Rvr Dam (USC00066966) is a weather station in Connecticut, United States at 41.58 latitude and -73.43 longitude, 67 m (220 ft) above sea level.
- The station reports from 1948 to 2014, 67 years of record.
- 0 records set at Rocky Rvr Dam still stand.
- Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Rocky Rvr Dam set a daily record precipitation of 32.3 mm (1.3 in) on 23 September 2013.
About the Station
- Location: Connecticut, United States, 41.58 latitude, -73.43 longitude.
- Elevation: 67 m (220 ft).
- Period of record: 1948 to 2014, 67 years.
- Eligible elements: prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | n/a | n/a | n/a | n/a |
| Feb | n/a | n/a | n/a | n/a |
| Mar | n/a | n/a | n/a | n/a |
| Apr | n/a | n/a | n/a | n/a |
| May | n/a | n/a | n/a | n/a |
| Jun | n/a | n/a | n/a | n/a |
| Jul | n/a | n/a | n/a | n/a |
| Aug | n/a | n/a | n/a | n/a |
| Sep | n/a | n/a | n/a | n/a |
| Oct | n/a | n/a | n/a | n/a |
| Nov | n/a | n/a | n/a | n/a |
| Dec | n/a | n/a | n/a | n/a |
Which Years Hold Standing Records
0 standing records| Year set | Standing records |
|---|
All-Time Record Progression
4 new records| Date | Kind | Detail |
|---|---|---|
| 1994-02-12 | Record snow depth | Record snow depth 40.6 cm (16.0 in) |
| 1996-01-08 | Record snow depth | Record snow depth 45.7 cm (18.0 in) |
| 1996-01-13 | Record snow depth | Record snow depth 50.8 cm (20.0 in) |
| 1999-09-16 | Record daily precipitation | Record daily precipitation 218.4 mm (8.6 in) |
Wettest Day of Each Month
Sep: 218.4 mm (8.6 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 65.3 mm (2.6 in) | 28 January 1996 |
| Feb | 60.5 mm (2.4 in) | 3 February 1973 |
| Mar | 71.6 mm (2.8 in) | 22 March 1980 |
| Apr | 94.5 mm (3.7 in) | 5 April 1987 |
| May | 101.1 mm (4.0 in) | 20 May 1999 |
| Jun | 143.8 mm (5.7 in) | 6 June 1982 |
| Jul | 112.5 mm (4.4 in) | 10 July 1997 |
| Aug | 168.7 mm (6.6 in) | 19 August 1955 |
| Sep | 218.4 mm (8.6 in) | 16 September 1999 |
| Oct | 154.7 mm (6.1 in) | 16 October 1955 |
| Nov | 71.9 mm (2.8 in) | 3 November 1954 |
| Dec | 83.8 mm (3.3 in) | 31 December 1948 |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 23 September 2013 | Rocky Rvr Dam, US | daily rain | 32.3 mm (1.3 in) | 2.8 mm (0.11 in) | 18 years | 12 of 100 (Routine) |
| 9 June 2013 | Rocky Rvr Dam, US | daily rain | 31.5 mm (1.2 in) | 23.4 mm (0.9 in) | 27 years | 31 of 100 (Routine) |
| 8 June 2013 | Rocky Rvr Dam, US | daily rain | 35.6 mm (1.4 in) | 8.2 mm (0.32 in) | 48 years | 26 of 100 (Routine) |
| 24 May 2013 | Rocky Rvr Dam, US | daily rain | 79.5 mm (3.1 in) | 41.7 mm (1.6 in) | 34 years | 52 of 100 (Notable) |
| 6 September 2012 | Rocky Rvr Dam, US | daily rain | 17.3 mm (0.7 in) | 4.1 mm (0.16 in) | 33 years | 17 of 100 (Routine) |
| 3 June 2012 | Rocky Rvr Dam, US | daily rain (Tie) | 33.3 mm (1.3 in) | tie | 56 years | 5 of 100 (Routine) |
| 8 December 2011 | Rocky Rvr Dam, US | daily rain | 41.1 mm (1.6 in) | 5.8 mm (0.23 in) | 34 years | 21 of 100 (Routine) |
| 24 November 2011 | Rocky Rvr Dam, US | daily rain | 24.6 mm (1.0 in) | 5.3 mm (0.21 in) | 48 years | 20 of 100 (Routine) |
| 1 October 2011 | Rocky Rvr Dam, US | daily rain | 22.4 mm (0.9 in) | 0.6 mm (0.02 in) | 28 years | 14 of 100 (Routine) |
| 24 September 2011 | Rocky Rvr Dam, US | daily rain | 42.7 mm (1.7 in) | 18.3 mm (0.7 in) | 36 years | 26 of 100 (Routine) |
| 8 September 2011 | Rocky Rvr Dam, US | daily rain | 42.2 mm (1.7 in) | 13.8 mm (0.5 in) | 52 years | 28 of 100 (Routine) |
| 29 August 2011 | Rocky Rvr Dam, US | daily rain | 100.6 mm (4.0 in) | 59.5 mm (2.3 in) | 34 years | 52 of 100 (Notable) |
| 10 June 2011 | Rocky Rvr Dam, US | daily rain | 36.3 mm (1.4 in) | 2.8 mm (0.11 in) | 38 years | 19 of 100 (Routine) |
| 19 May 2011 | Rocky Rvr Dam, US | daily rain | 43.2 mm (1.7 in) | 5.1 mm (0.20 in) | 34 years | 20 of 100 (Routine) |
| 7 March 2011 | Rocky Rvr Dam, US | daily rain | 69.6 mm (2.7 in) | 29.2 mm (1.1 in) | 32 years | 42 of 100 (Notable) |
| 13 January 2011 | Rocky Rvr Dam, US | daily rain | 24.4 mm (1.0 in) | 7.9 mm (0.31 in) | 15 years | 18 of 100 (Routine) |
| 15 July 2000 | Rocky Rvr Dam, US | daily rain | 110.2 mm (4.3 in) | 90.1 mm (3.5 in) | 39 years | 56 of 100 (Notable) |
| 11 June 2000 | Rocky Rvr Dam, US | daily rain | 32.5 mm (1.3 in) | 13.2 mm (0.5 in) | 33 years | 24 of 100 (Routine) |
| 21 April 2000 | Rocky Rvr Dam, US | daily rain | 29.7 mm (1.2 in) | 5.6 mm (0.22 in) | 28 years | 18 of 100 (Routine) |
| 11 March 2000 | Rocky Rvr Dam, US | daily rain | 27.4 mm (1.1 in) | 0.2 mm (0.01 in) | 20 years | 11 of 100 (Routine) |
Extremes by Year
1948 to 2014| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Wettest day (Rx1day) | 218.4 mm (8.6 in) | 1999 | 68.3 mm (2.7 in) | 57 |
| Wettest five days (Rx5day) | 263.2 mm (10.4 in) | 1955 | 102.1 mm (4.0 in) | 57 |
| Longest dry spell (CDD) | 35 days | 1948 | 16 days | 57 |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1948 | 83.8 mm (3.3 in) |
| 1949 | 68.6 mm (2.7 in) |
| 1950 | 79.8 mm (3.1 in) |
| 1951 | 56.9 mm (2.2 in) |
| 1952 | 70.4 mm (2.8 in) |
| 1953 | 52.8 mm (2.1 in) |
| 1954 | 71.9 mm (2.8 in) |
| 1955 | 168.7 mm (6.6 in) |
| 1956 | 68.3 mm (2.7 in) |
| 1957 | 57.2 mm (2.3 in) |
| 1958 | 62.2 mm (2.4 in) |
| 1959 | 55.1 mm (2.2 in) |
| 1960 | 65.8 mm (2.6 in) |
| 1961 | 37.3 mm (1.5 in) |
| 1962 | 51.3 mm (2.0 in) |
| 1963 | 55.6 mm (2.2 in) |
| 1964 | 55.9 mm (2.2 in) |
| 1965 | 40.1 mm (1.6 in) |
| 1966 | 62.2 mm (2.4 in) |
| 1967 | 41.9 mm (1.6 in) |
| 1968 | 69.3 mm (2.7 in) |
| 1969 | 85.6 mm (3.4 in) |
| 1970 | 54.6 mm (2.1 in) |
| 1971 | 120.1 mm (4.7 in) |
| 1972 | 80.5 mm (3.2 in) |
| 1973 | 60.5 mm (2.4 in) |
| 1974 | 66.8 mm (2.6 in) |
| 1975 | 116.1 mm (4.6 in) |
| 1976 | 84.6 mm (3.3 in) |
| 1977 | 64.0 mm (2.5 in) |
| 1978 | 50.8 mm (2.0 in) |
| 1979 | 66.8 mm (2.6 in) |
| 1980 | 71.6 mm (2.8 in) |
| 1981 | 51.6 mm (2.0 in) |
| 1982 | 143.8 mm (5.7 in) |
| 1983 | 74.2 mm (2.9 in) |
| 1984 | 77.5 mm (3.1 in) |
| 1985 | 74.9 mm (2.9 in) |
| 1986 | 53.3 mm (2.1 in) |
| 1987 | 94.5 mm (3.7 in) |
| 1988 | 70.1 mm (2.8 in) |
| 1989 | 65.0 mm (2.6 in) |
| 1990 | 73.4 mm (2.9 in) |
| 1991 | 112.5 mm (4.4 in) |
| 1992 | 58.9 mm (2.3 in) |
| 1993 | 49.3 mm (1.9 in) |
| 1994 | 48.3 mm (1.9 in) |
| 1995 | 65.5 mm (2.6 in) |
| 1996 | 105.7 mm (4.2 in) |
| 1997 | 112.5 mm (4.4 in) |
| 1998 | 69.9 mm (2.8 in) |
| 1999 | 218.4 mm (8.6 in) |
| 2000 | 110.2 mm (4.3 in) |
| 2011 | 100.6 mm (4.0 in) |
| 2012 | 36.8 mm (1.4 in) |
| 2013 | 79.5 mm (3.1 in) |
| 2014 | 7.4 mm (0.29 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1948 | 109.5 mm (4.3 in) |
| 1949 | 147.1 mm (5.8 in) |
| 1950 | 100.1 mm (3.9 in) |
| 1951 | 86.2 mm (3.4 in) |
| 1952 | 90.9 mm (3.6 in) |
| 1953 | 119.3 mm (4.7 in) |
| 1954 | 110.4 mm (4.3 in) |
| 1955 | 263.2 mm (10.4 in) |
| 1956 | 82.0 mm (3.2 in) |
| 1957 | 90.2 mm (3.6 in) |
| 1958 | 114.5 mm (4.5 in) |
| 1959 | 118.2 mm (4.7 in) |
| 1960 | 104.2 mm (4.1 in) |
| 1961 | 73.1 mm (2.9 in) |
| 1962 | 56.7 mm (2.2 in) |
| 1963 | 70.1 mm (2.8 in) |
| 1964 | 61.7 mm (2.4 in) |
| 1965 | 45.4 mm (1.8 in) |
| 1966 | 87.4 mm (3.4 in) |
| 1967 | 63.1 mm (2.5 in) |
| 1968 | 87.3 mm (3.4 in) |
| 1969 | 156.4 mm (6.2 in) |
| 1970 | 90.4 mm (3.6 in) |
| 1971 | 184.7 mm (7.3 in) |
| 1972 | 95.7 mm (3.8 in) |
| 1973 | 82.9 mm (3.3 in) |
| 1974 | 74.1 mm (2.9 in) |
| 1975 | 246.7 mm (9.7 in) |
| 1976 | 106.2 mm (4.2 in) |
| 1977 | 110.0 mm (4.3 in) |
| 1978 | 74.7 mm (2.9 in) |
| 1979 | 126.0 mm (5.0 in) |
| 1980 | 91.1 mm (3.6 in) |
| 1981 | 107.4 mm (4.2 in) |
| 1982 | 189.6 mm (7.5 in) |
| 1983 | 111.3 mm (4.4 in) |
| 1984 | 227.8 mm (9.0 in) |
| 1985 | 92.8 mm (3.7 in) |
| 1986 | 92.9 mm (3.7 in) |
| 1987 | 140.7 mm (5.5 in) |
| 1988 | 109.5 mm (4.3 in) |
| 1989 | 136.7 mm (5.4 in) |
| 1990 | 136.6 mm (5.4 in) |
| 1991 | 199.1 mm (7.8 in) |
| 1992 | 105.9 mm (4.2 in) |
| 1993 | 63.5 mm (2.5 in) |
| 1994 | 101.4 mm (4.0 in) |
| 1995 | 91.3 mm (3.6 in) |
| 1996 | 137.2 mm (5.4 in) |
| 1997 | 115.3 mm (4.5 in) |
| 1998 | 91.7 mm (3.6 in) |
| 1999 | 233.9 mm (9.2 in) |
| 2000 | 111.0 mm (4.4 in) |
| 2011 | 100.6 mm (4.0 in) |
| 2012 | 58.2 mm (2.3 in) |
| 2013 | 102.1 mm (4.0 in) |
| 2014 | 10.2 mm (0.4 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1948 | 35 days |
| 1949 | 22 days |
| 1950 | 16 days |
| 1951 | 12 days |
| 1952 | 17 days |
| 1953 | 25 days |
| 1954 | 13 days |
| 1955 | 17 days |
| 1956 | 17 days |
| 1957 | 16 days |
| 1958 | 15 days |
| 1959 | 16 days |
| 1960 | 13 days |
| 1961 | 15 days |
| 1962 | 15 days |
| 1963 | 24 days |
| 1964 | 19 days |
| 1965 | 16 days |
| 1966 | 17 days |
| 1967 | 14 days |
| 1968 | 26 days |
| 1969 | 17 days |
| 1970 | 32 days |
| 1971 | 17 days |
| 1972 | 10 days |
| 1973 | 14 days |
| 1974 | 13 days |
| 1975 | 16 days |
| 1976 | 17 days |
| 1977 | 17 days |
| 1978 | 23 days |
| 1979 | 11 days |
| 1980 | 27 days |
| 1981 | 25 days |
| 1982 | 20 days |
| 1983 | 20 days |
| 1984 | 17 days |
| 1985 | 19 days |
| 1986 | 22 days |
| 1987 | 13 days |
| 1988 | 14 days |
| 1989 | 15 days |
| 1990 | 16 days |
| 1991 | 14 days |
| 1992 | 15 days |
| 1993 | 12 days |
| 1994 | 10 days |
| 1995 | 16 days |
| 1996 | 12 days |
| 1997 | 15 days |
| 1998 | 13 days |
| 1999 | 17 days |
| 2000 | 10 days |
| 2011 | 15 days |
| 2012 | 20 days |
| 2013 | 21 days |
| 2014 | 7 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
51 years, 1949 to 2012A day with at least 66.1 mm (2.6 in) of rain is expected about once in 2 years. A day with at least 212.8 mm (8.4 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 66.1 mm (2.6 in) | |
| 5 years | 90.8 mm (3.6 in) | |
| 10 years | 111.8 mm (4.4 in) | |
| 25 years | 145.1 mm (5.7 in) | |
| 50 years | 175.9 mm (6.9 in) | |
| 100 years | 212.8 mm (8.4 in) | Longer than the 51 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, 51 years of values from 1949 to 2012.
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: 218.4 mm (8.6 in) in 1999; 168.7 mm (6.6 in) in 1955; 143.8 mm (5.7 in) in 1982.
Download the Data
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).