Riga Weather Records (LG000026422)
Record envelope, standing records and threshold days for Riga (LG000026422), Latvia, with 62 years of record.
Key Facts for Riga
- Riga (LG000026422) is a weather station in Latvia at 56.96 latitude and 24.04 longitude, 17 m (56 ft) above sea level.
- The station reports from 1943 to 2004, 62 years of record.
- 1,464 records set at Riga still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Riga set a daily record high minimum temperature of 4.4 C (39.9 F) on 8 December 2004.
About the Station
- Location: Latvia, 56.96 latitude, 24.04 longitude.
- Elevation: 17 m (56 ft).
- Period of record: 1943 to 2004, 62 years.
- Eligible elements: tmax, tmin, prcp.
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 | 9.4 C (48.9 F) | -33.7 C (-28.7 F) | n/a | n/a |
| Feb | 13.5 C (56.3 F) | -34.9 C (-30.8 F) | n/a | n/a |
| Mar | 20.5 C (68.9 F) | -23.3 C (-9.9 F) | n/a | n/a |
| Apr | 27.9 C (82.2 F) | -11.4 C (11.5 F) | n/a | n/a |
| May | 30.4 C (86.7 F) | -5.3 C (22.5 F) | n/a | n/a |
| Jun | 32.5 C (90.5 F) | -1.2 C (29.8 F) | n/a | n/a |
| Jul | 34.1 C (93.4 F) | 4.0 C (39.2 F) | n/a | n/a |
| Aug | 33.6 C (92.5 F) | 0.0 C (32.0 F) | n/a | n/a |
| Sep | 29.4 C (84.9 F) | -4.1 C (24.6 F) | n/a | n/a |
| Oct | 23.4 C (74.1 F) | -8.7 C (16.3 F) | n/a | n/a |
| Nov | 17.2 C (63.0 F) | -18.9 C (-2.0 F) | n/a | n/a |
| Dec | 11.5 C (52.7 F) | -31.9 C (-25.4 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1943 | 19 |
| 1944 | 23 |
| 1945 | 19 |
| 1946 | 12 |
| 1947 | 19 |
| 1948 | 9 |
| 1949 | 29 |
| 1950 | 16 |
| 1951 | 23 |
| 1952 | 23 |
| 1953 | 22 |
| 1954 | 19 |
| 1955 | 28 |
| 1956 | 46 |
| 1957 | 21 |
| 1958 | 13 |
| 1959 | 24 |
| 1960 | 9 |
| 1961 | 15 |
| 1962 | 24 |
| 1963 | 36 |
| 1964 | 14 |
| 1965 | 35 |
| 1966 | 22 |
| 1967 | 29 |
| 1968 | 44 |
| 1969 | 26 |
| 1970 | 8 |
| 1971 | 30 |
| 1972 | 22 |
| 1973 | 30 |
| 1974 | 18 |
| 1975 | 21 |
| 1976 | 29 |
| 1977 | 30 |
| 1978 | 42 |
| 1979 | 39 |
| 1980 | 23 |
| 1981 | 23 |
| 1982 | 14 |
| 1983 | 16 |
| 1984 | 21 |
| 1985 | 25 |
| 1986 | 28 |
| 1987 | 30 |
| 1988 | 20 |
| 1989 | 52 |
| 1990 | 43 |
| 1991 | 17 |
| 1992 | 28 |
| 1993 | 13 |
| 1994 | 13 |
| 1995 | 18 |
| 1996 | 21 |
| 1997 | 26 |
| 1998 | 21 |
| 1999 | 18 |
| 2000 | 17 |
| 2001 | 15 |
| 2002 | 37 |
| 2003 | 23 |
| 2004 | 14 |
All-Time Record Progression
9 new records| Date | Kind | Detail |
|---|---|---|
| 1976-07-22 | Record high minimum temperature | Record high minimum temperature 20.5 C (68.9 F) |
| 1987-01-11 | Record low maximum temperature | Record low maximum temperature -28.3 C (-18.9 F) |
| 1989-08-17 | Record high minimum temperature | Record high minimum temperature 21.1 C (70.0 F) |
| 1993-09-13 | Record daily precipitation | Record daily precipitation 70.1 mm (2.8 in) |
| 1994-05-01 | Record daily precipitation | Record daily precipitation 99.1 mm (3.9 in) |
| 1996-05-21 | Record daily precipitation | Record daily precipitation 114.0 mm (4.5 in) |
| 1997-07-01 | Record high minimum temperature | Record high minimum temperature 22.0 C (71.6 F) |
| 2002-07-31 | Record high maximum temperature | Record high maximum temperature 34.1 C (93.4 F) |
| 2002-07-31 | Record high minimum temperature | Record high minimum temperature 22.5 C (72.5 F) |
Wettest Day of Each Month
May: 114.0 mm (4.5 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 17.4 mm (0.7 in) | 16 January 1990 |
| Feb | 16.5 mm (0.6 in) | 16 February 1999 |
| Mar | 30.2 mm (1.2 in) | 27 March 1981 |
| Apr | 34.4 mm (1.4 in) | 19 April 1959 |
| May | 114.0 mm (4.5 in) | 21 May 1996 |
| Jun | 65.3 mm (2.6 in) | 15 June 1972 |
| Jul | 57.7 mm (2.3 in) | 28 July 1945 |
| Aug | 53.8 mm (2.1 in) | 9 August 1978 |
| Sep | 70.1 mm (2.8 in) | 13 September 1993 |
| Oct | 39.9 mm (1.6 in) | 2 October 1995 |
| Nov | 26.9 mm (1.1 in) | 23 November 2004 |
| Dec | 19.0 mm (0.7 in) | 4 December 1973 |
Period of Record Coverage
1943 to 2004| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 320 | 87% | No |
| 1993 | 244 | 67% | No |
| 1994 | 304 | 83% | No |
| 1995 | 302 | 83% | No |
| 1996 | 314 | 86% | No |
| 1997 | 300 | 82% | No |
| 1998 | 292 | 80% | No |
| 1999 | 303 | 83% | No |
| 2000 | 291 | 80% | No |
| 2001 | 321 | 88% | No |
| 2002 | 304 | 83% | No |
| 2003 | 311 | 85% | No |
| 2004 | 320 | 87% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 8 December 2004 | Riga, LV | daily high min | 4.4 C (39.9 F) | 1.4 C (2.5 F) | 20 years | 14 of 100 (Routine) |
| 7 December 2004 | Riga, LV | daily high max | 7.5 C (45.5 F) | 0.8 C (1.4 F) | 5 years | 8 of 100 (Routine) |
| 23 November 2004 | Riga, LV | monthly rain | 26.9 mm (1.1 in) | 1.0 mm (0.04 in) | 4 years | 19 of 100 (Routine) |
| 31 October 2004 | Riga, LV | daily rain | 19.1 mm (0.8 in) | 6.2 mm (0.24 in) | 34 years | 20 of 100 (Routine) |
| 26 October 2004 | Riga, LV | daily high max | 13.9 C (57.0 F) | 1.1 C (2.0 F) | 42 years | 20 of 100 (Routine) |
| 26 October 2004 | Riga, LV | daily high min | 10.3 C (50.5 F) | 0.3 C (0.5 F) | 43 years | 18 of 100 (Routine) |
| 24 October 2004 | Riga, LV | daily rain | 11.7 mm (0.5 in) | 0.8 mm (0.03 in) | 15 years | 11 of 100 (Routine) |
| 19 August 2004 | Riga, LV | daily high min | 17.2 C (63.0 F) | 0.2 C (0.4 F) | 19 years | 11 of 100 (Routine) |
| 4 August 2004 | Riga, LV | daily high min (Tie) | 18.8 C (65.8 F) | tie | 37 years | 4 of 100 (Routine) |
| 3 August 2004 | Riga, LV | daily high min (Tie) | 19.2 C (66.6 F) | tie | 33 years | 3 of 100 (Routine) |
| 2 July 2004 | Riga, LV | daily low max | 15.1 C (59.2 F) | 1.0 C (1.8 F) | 44 years | 21 of 100 (Routine) |
| 13 May 2004 | Riga, LV | daily low min | 0.1 C (32.2 F) | 0.2 C (0.4 F) | 24 years | 13 of 100 (Routine) |
| 8 May 2004 | Riga, LV | daily high min | 14.7 C (58.5 F) | 2.5 C (4.5 F) | 11 years | 15 of 100 (Routine) |
| 7 May 2004 | Riga, LV | daily high min | 14.2 C (57.6 F) | 0.2 C (0.4 F) | 56 years | 22 of 100 (Routine) |
| 6 May 2004 | Riga, LV | daily high min | 16.0 C (60.8 F) | 3.8 C (6.8 F) | 55 years | 31 of 100 (Routine) |
| 6 May 2004 | Riga, LV | daily high max | 26.2 C (79.2 F) | 0.3 C (0.5 F) | 27 years | 14 of 100 (Routine) |
| 5 May 2004 | Riga, LV | daily high min | 16.1 C (61.0 F) | 4.2 C (7.6 F) | 27 years | 24 of 100 (Routine) |
| 5 May 2004 | Riga, LV | daily high max | 27.0 C (80.6 F) | 0.9 C (1.6 F) | 50 years | 22 of 100 (Routine) |
| 20 April 2004 | Riga, LV | daily high min | 10.9 C (51.6 F) | 0.8 C (1.4 F) | 4 years | 9 of 100 (Routine) |
| 25 March 2004 | Riga, LV | daily rain | 10.9 mm (0.4 in) | 0.6 mm (0.02 in) | 15 years | 12 of 100 (Routine) |
Climate Trend
49 complete years, 1943 to 1991| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1943 | 6.9 C | +0.70 C |
| 1944 | 6.6 C | +0.35 C |
| 1945 | 5.9 C | -0.34 C |
| 1946 | 6.0 C | -0.25 C |
| 1947 | 5.2 C | -0.98 C |
| 1948 | 6.8 C | +0.59 C |
| 1949 | 7.7 C | +1.46 C |
| 1950 | 6.1 C | -0.09 C |
| 1951 | 6.0 C | -0.18 C |
| 1952 | 5.4 C | -0.86 C |
| 1953 | 6.4 C | +0.20 C |
| 1954 | 5.6 C | -0.67 C |
| 1955 | 5.4 C | -0.78 C |
| 1956 | 4.5 C | -1.77 C |
| 1957 | 6.8 C | +0.61 C |
| 1958 | 5.7 C | -0.52 C |
| 1959 | 6.9 C | +0.66 C |
| 1960 | 6.0 C | -0.21 C |
| 1961 | 7.4 C | +1.14 C |
| 1962 | 5.5 C | -0.76 C |
| 1963 | 5.0 C | -1.21 C |
| 1964 | 5.9 C | -0.31 C |
| 1965 | 5.3 C | -0.92 C |
| 1966 | 5.5 C | -0.68 C |
| 1967 | 6.5 C | +0.24 C |
| 1968 | 5.8 C | -0.45 C |
| 1969 | 4.6 C | -1.66 C |
| 1970 | 5.4 C | -0.86 C |
| 1971 | 6.8 C | +0.62 C |
| 1972 | 7.1 C | +0.85 C |
| 1973 | 6.6 C | +0.36 C |
| 1974 | 7.0 C | +0.82 C |
| 1975 | 8.1 C | +1.86 C |
| 1976 | 4.9 C | -1.30 C |
| 1977 | 6.0 C | -0.23 C |
| 1978 | 5.3 C | -0.93 C |
| 1979 | 5.8 C | -0.44 C |
| 1980 | 5.4 C | -0.80 C |
| 1981 | 6.4 C | +0.19 C |
| 1982 | 6.6 C | +0.38 C |
| 1983 | 7.6 C | +1.33 C |
| 1984 | 7.1 C | +0.89 C |
| 1985 | 5.0 C | -1.25 C |
| 1986 | 6.4 C | +0.22 C |
| 1987 | 5.0 C | -1.23 C |
| 1988 | 7.0 C | +0.76 C |
| 1989 | 8.5 C | +2.28 C |
| 1990 | 8.4 C | +2.13 C |
| 1991 | 7.5 C | +1.26 C |
The fitted trend in annual mean temperature here over 1943 to 1991 is 0.16 C (-0.04 to 0.35) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.3 F (-0.1 to 0.6) per decade. The slope is a straight line fitted to 49 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.16 C (-0.04 to 0.35) per decade | 0.3 F (-0.1 to 0.6) per decade | 1943 to 1991 | 49 | Not clearly different from zero |
| Mean daily maximum | 0.1 C (-0.1 to 0.2) per decade | 0.1 F (-0.2 to 0.4) per decade | 1943 to 1991 | 49 | Not clearly different from zero |
| Mean daily minimum | 0.26 C (0.04 to 0.48) per decade | 0.5 F (0.1 to 0.9) per decade | 1943 to 1991 | 49 | Rise |
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
1943 to 2004| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 34.1 C (93.4 F) | 2002 | 30.1 C (86.2 F) | 62 |
| Coldest night (TNn) | -34.9 C (-30.8 F) | 1956 | -22.0 C (-7.6 F) | 62 |
| Wettest day (Rx1day) | 114.0 mm (4.5 in) | 1996 | 31.2 mm (1.2 in) | 62 |
| Wettest five days (Rx5day) | 128.2 mm (5.0 in) | 1991 | 52.2 mm (2.1 in) | 61 |
| Longest dry spell (CDD) | 43 days | 1972 | 20 days | 62 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1943 | 30.5 C (86.9 F) |
| 1944 | 30.7 C (87.3 F) |
| 1945 | 29.1 C (84.4 F) |
| 1946 | 30.0 C (86.0 F) |
| 1947 | 29.8 C (85.6 F) |
| 1948 | 29.8 C (85.6 F) |
| 1949 | 28.6 C (83.5 F) |
| 1950 | 28.6 C (83.5 F) |
| 1951 | 30.1 C (86.2 F) |
| 1952 | 28.6 C (83.5 F) |
| 1953 | 29.5 C (85.1 F) |
| 1954 | 30.9 C (87.6 F) |
| 1955 | 29.8 C (85.6 F) |
| 1956 | 32.1 C (89.8 F) |
| 1957 | 29.8 C (85.6 F) |
| 1958 | 30.1 C (86.2 F) |
| 1959 | 33.6 C (92.5 F) |
| 1960 | 28.7 C (83.7 F) |
| 1961 | 29.7 C (85.5 F) |
| 1962 | 25.1 C (77.2 F) |
| 1963 | 32.5 C (90.5 F) |
| 1964 | 31.0 C (87.8 F) |
| 1965 | 27.3 C (81.1 F) |
| 1966 | 29.4 C (84.9 F) |
| 1967 | 30.7 C (87.3 F) |
| 1968 | 32.2 C (90.0 F) |
| 1969 | 30.9 C (87.6 F) |
| 1970 | 29.3 C (84.7 F) |
| 1971 | 31.4 C (88.5 F) |
| 1972 | 31.1 C (88.0 F) |
| 1973 | 30.8 C (87.4 F) |
| 1974 | 26.4 C (79.5 F) |
| 1975 | 29.1 C (84.4 F) |
| 1976 | 30.3 C (86.5 F) |
| 1977 | 29.5 C (85.1 F) |
| 1978 | 29.2 C (84.6 F) |
| 1979 | 31.1 C (88.0 F) |
| 1980 | 28.7 C (83.7 F) |
| 1981 | 29.4 C (84.9 F) |
| 1982 | 31.4 C (88.5 F) |
| 1983 | 29.0 C (84.2 F) |
| 1984 | 32.4 C (90.3 F) |
| 1985 | 29.5 C (85.1 F) |
| 1986 | 30.5 C (86.9 F) |
| 1987 | 27.6 C (81.7 F) |
| 1988 | 32.5 C (90.5 F) |
| 1989 | 30.9 C (87.6 F) |
| 1990 | 28.4 C (83.1 F) |
| 1991 | 28.5 C (83.3 F) |
| 1992 | 31.8 C (89.2 F) |
| 1993 | 27.2 C (81.0 F) |
| 1994 | 32.7 C (90.9 F) |
| 1995 | 30.5 C (86.9 F) |
| 1996 | 29.1 C (84.4 F) |
| 1997 | 32.0 C (89.6 F) |
| 1998 | 30.5 C (86.9 F) |
| 1999 | 33.6 C (92.5 F) |
| 2000 | 30.5 C (86.9 F) |
| 2001 | 32.3 C (90.1 F) |
| 2002 | 34.1 C (93.4 F) |
| 2003 | 33.7 C (92.7 F) |
| 2004 | 28.9 C (84.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1943 | -21.9 C (-7.4 F) |
| 1944 | -15.5 C (4.1 F) |
| 1945 | -25.3 C (-13.5 F) |
| 1946 | -23.0 C (-9.4 F) |
| 1947 | -27.2 C (-17.0 F) |
| 1948 | -17.9 C (-0.2 F) |
| 1949 | -15.8 C (3.6 F) |
| 1950 | -31.6 C (-24.9 F) |
| 1951 | -25.3 C (-13.5 F) |
| 1952 | -21.0 C (-5.8 F) |
| 1953 | -21.4 C (-6.5 F) |
| 1954 | -26.7 C (-16.1 F) |
| 1955 | -22.9 C (-9.2 F) |
| 1956 | -34.9 C (-30.8 F) |
| 1957 | -20.4 C (-4.7 F) |
| 1958 | -22.0 C (-7.6 F) |
| 1959 | -23.4 C (-10.1 F) |
| 1960 | -23.3 C (-9.9 F) |
| 1961 | -16.8 C (1.8 F) |
| 1962 | -22.5 C (-8.5 F) |
| 1963 | -27.0 C (-16.6 F) |
| 1964 | -27.0 C (-16.6 F) |
| 1965 | -22.0 C (-7.6 F) |
| 1966 | -28.2 C (-18.8 F) |
| 1967 | -28.1 C (-18.6 F) |
| 1968 | -28.4 C (-19.1 F) |
| 1969 | -25.0 C (-13.0 F) |
| 1970 | -33.7 C (-28.7 F) |
| 1971 | -18.4 C (-1.1 F) |
| 1972 | -23.6 C (-10.5 F) |
| 1973 | -23.6 C (-10.5 F) |
| 1974 | -12.1 C (10.2 F) |
| 1975 | -9.9 C (14.2 F) |
| 1976 | -20.7 C (-5.3 F) |
| 1977 | -21.4 C (-6.5 F) |
| 1978 | -31.9 C (-25.4 F) |
| 1979 | -27.4 C (-17.3 F) |
| 1980 | -27.3 C (-17.1 F) |
| 1981 | -19.4 C (-2.9 F) |
| 1982 | -18.8 C (-1.8 F) |
| 1983 | -16.7 C (1.9 F) |
| 1984 | -15.5 C (4.1 F) |
| 1985 | -34.6 C (-30.3 F) |
| 1986 | -22.7 C (-8.9 F) |
| 1987 | -31.7 C (-25.1 F) |
| 1988 | -17.9 C (-0.2 F) |
| 1989 | -21.3 C (-6.3 F) |
| 1990 | -9.5 C (14.9 F) |
| 1991 | -17.0 C (1.4 F) |
| 1992 | -13.3 C (8.1 F) |
| 1993 | -18.8 C (-1.8 F) |
| 1994 | -29.4 C (-20.9 F) |
| 1995 | -20.5 C (-4.9 F) |
| 1996 | -27.8 C (-18.0 F) |
| 1997 | -21.3 C (-6.3 F) |
| 1998 | -15.4 C (4.3 F) |
| 1999 | -18.3 C (-0.9 F) |
| 2000 | -14.8 C (5.4 F) |
| 2001 | -22.7 C (-8.9 F) |
| 2002 | -19.4 C (-2.9 F) |
| 2003 | -26.3 C (-15.3 F) |
| 2004 | -16.3 C (2.7 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1943 | 31.7 mm (1.2 in) |
| 1944 | 26.7 mm (1.1 in) |
| 1945 | 57.7 mm (2.3 in) |
| 1946 | 30.6 mm (1.2 in) |
| 1947 | 39.4 mm (1.6 in) |
| 1948 | 33.9 mm (1.3 in) |
| 1949 | 22.2 mm (0.9 in) |
| 1950 | 40.7 mm (1.6 in) |
| 1951 | 33.7 mm (1.3 in) |
| 1952 | 19.4 mm (0.8 in) |
| 1953 | 31.4 mm (1.2 in) |
| 1954 | 32.5 mm (1.3 in) |
| 1955 | 23.0 mm (0.9 in) |
| 1956 | 26.4 mm (1.0 in) |
| 1957 | 32.4 mm (1.3 in) |
| 1958 | 39.0 mm (1.5 in) |
| 1959 | 34.4 mm (1.4 in) |
| 1960 | 30.1 mm (1.2 in) |
| 1961 | 39.1 mm (1.5 in) |
| 1962 | 16.2 mm (0.6 in) |
| 1963 | 20.8 mm (0.8 in) |
| 1964 | 30.0 mm (1.2 in) |
| 1965 | 23.6 mm (0.9 in) |
| 1966 | 41.5 mm (1.6 in) |
| 1967 | 20.3 mm (0.8 in) |
| 1968 | 16.8 mm (0.7 in) |
| 1969 | 19.4 mm (0.8 in) |
| 1970 | 32.6 mm (1.3 in) |
| 1971 | 20.5 mm (0.8 in) |
| 1972 | 65.3 mm (2.6 in) |
| 1973 | 19.0 mm (0.7 in) |
| 1974 | 38.3 mm (1.5 in) |
| 1975 | 30.4 mm (1.2 in) |
| 1976 | 24.9 mm (1.0 in) |
| 1977 | 20.8 mm (0.8 in) |
| 1978 | 53.8 mm (2.1 in) |
| 1979 | 31.0 mm (1.2 in) |
| 1980 | 41.7 mm (1.6 in) |
| 1981 | 30.2 mm (1.2 in) |
| 1982 | 17.1 mm (0.7 in) |
| 1983 | 30.3 mm (1.2 in) |
| 1984 | 28.5 mm (1.1 in) |
| 1985 | 49.4 mm (1.9 in) |
| 1986 | 44.7 mm (1.8 in) |
| 1987 | 23.3 mm (0.9 in) |
| 1988 | 42.0 mm (1.7 in) |
| 1989 | 33.1 mm (1.3 in) |
| 1990 | 36.6 mm (1.4 in) |
| 1991 | 48.6 mm (1.9 in) |
| 1992 | 30.0 mm (1.2 in) |
| 1993 | 70.1 mm (2.8 in) |
| 1994 | 99.1 mm (3.9 in) |
| 1995 | 39.9 mm (1.6 in) |
| 1996 | 114.0 mm (4.5 in) |
| 1997 | 25.9 mm (1.0 in) |
| 1998 | 22.4 mm (0.9 in) |
| 1999 | 25.9 mm (1.0 in) |
| 2000 | 50.0 mm (2.0 in) |
| 2001 | 46.0 mm (1.8 in) |
| 2002 | 35.8 mm (1.4 in) |
| 2003 | 21.1 mm (0.8 in) |
| 2004 | 26.9 mm (1.1 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1943 | 73.6 mm (2.9 in) |
| 1944 | 55.1 mm (2.2 in) |
| 1945 | 102.6 mm (4.0 in) |
| 1946 | 52.2 mm (2.1 in) |
| 1947 | 60.9 mm (2.4 in) |
| 1948 | 60.1 mm (2.4 in) |
| 1949 | 64.3 mm (2.5 in) |
| 1950 | 60.2 mm (2.4 in) |
| 1951 | 55.9 mm (2.2 in) |
| 1952 | 42.1 mm (1.7 in) |
| 1953 | 45.8 mm (1.8 in) |
| 1954 | 59.8 mm (2.4 in) |
| 1955 | 48.6 mm (1.9 in) |
| 1956 | 52.2 mm (2.1 in) |
| 1957 | 66.7 mm (2.6 in) |
| 1958 | 44.9 mm (1.8 in) |
| 1959 | 50.3 mm (2.0 in) |
| 1960 | 64.5 mm (2.5 in) |
| 1961 | 45.8 mm (1.8 in) |
| 1962 | 40.1 mm (1.6 in) |
| 1963 | 27.9 mm (1.1 in) |
| 1964 | 47.0 mm (1.9 in) |
| 1965 | 43.1 mm (1.7 in) |
| 1966 | 53.9 mm (2.1 in) |
| 1967 | 33.3 mm (1.3 in) |
| 1968 | 37.7 mm (1.5 in) |
| 1969 | 38.1 mm (1.5 in) |
| 1970 | 57.8 mm (2.3 in) |
| 1971 | 50.7 mm (2.0 in) |
| 1972 | 71.1 mm (2.8 in) |
| 1973 | 40.8 mm (1.6 in) |
| 1974 | 60.5 mm (2.4 in) |
| 1975 | 52.6 mm (2.1 in) |
| 1976 | 52.2 mm (2.1 in) |
| 1977 | 60.0 mm (2.4 in) |
| 1978 | 114.0 mm (4.5 in) |
| 1979 | 63.3 mm (2.5 in) |
| 1980 | 62.2 mm (2.4 in) |
| 1981 | 52.0 mm (2.0 in) |
| 1982 | 29.0 mm (1.1 in) |
| 1983 | 59.0 mm (2.3 in) |
| 1984 | 44.2 mm (1.7 in) |
| 1985 | 56.5 mm (2.2 in) |
| 1986 | 93.7 mm (3.7 in) |
| 1987 | 50.3 mm (2.0 in) |
| 1988 | 59.6 mm (2.3 in) |
| 1989 | 46.4 mm (1.8 in) |
| 1990 | 59.7 mm (2.4 in) |
| 1991 | 128.2 mm (5.0 in) |
| 1992 | 40.6 mm (1.6 in) |
| 1993 | 89.7 mm (3.5 in) |
| 1994 | 99.4 mm (3.9 in) |
| 1995 | 59.0 mm (2.3 in) |
| 1996 | 37.4 mm (1.5 in) |
| 1997 | 69.1 mm (2.7 in) |
| 1998 | n/a |
| 1999 | 48.5 mm (1.9 in) |
| 2000 | 37.3 mm (1.5 in) |
| 2001 | 50.8 mm (2.0 in) |
| 2002 | 36.4 mm (1.4 in) |
| 2003 | 50.5 mm (2.0 in) |
| 2004 | 16.0 mm (0.6 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1943 | 33 days |
| 1944 | 19 days |
| 1945 | 14 days |
| 1946 | 25 days |
| 1947 | 28 days |
| 1948 | 32 days |
| 1949 | 30 days |
| 1950 | 18 days |
| 1951 | 19 days |
| 1952 | 18 days |
| 1953 | 32 days |
| 1954 | 39 days |
| 1955 | 21 days |
| 1956 | 28 days |
| 1957 | 20 days |
| 1958 | 17 days |
| 1959 | 20 days |
| 1960 | 15 days |
| 1961 | 37 days |
| 1962 | 16 days |
| 1963 | 21 days |
| 1964 | 27 days |
| 1965 | 26 days |
| 1966 | 15 days |
| 1967 | 11 days |
| 1968 | 25 days |
| 1969 | 18 days |
| 1970 | 17 days |
| 1971 | 19 days |
| 1972 | 43 days |
| 1973 | 17 days |
| 1974 | 26 days |
| 1975 | 23 days |
| 1976 | 22 days |
| 1977 | 20 days |
| 1978 | 20 days |
| 1979 | 21 days |
| 1980 | 20 days |
| 1981 | 17 days |
| 1982 | 18 days |
| 1983 | 19 days |
| 1984 | 23 days |
| 1985 | 17 days |
| 1986 | 36 days |
| 1987 | 22 days |
| 1988 | 21 days |
| 1989 | 32 days |
| 1990 | 28 days |
| 1991 | 15 days |
| 1992 | 15 days |
| 1993 | 16 days |
| 1994 | 21 days |
| 1995 | 13 days |
| 1996 | 2 days |
| 1997 | 2 days |
| 1998 | 3 days |
| 1999 | 15 days |
| 2000 | 2 days |
| 2001 | 2 days |
| 2002 | 2 days |
| 2003 | 4 days |
| 2004 | 3 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
49 years with a frostAcross 49 years with a frost, the median last spring frost at Riga falls on 18 May and the median first autumn frost on 3 October, which leaves a median of 145 days between them.
Fitted over all years, the growing season changes by +8.9 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1962 to 1991) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 18 May | n/a | 14 May | n/a | -4.0 days per decade |
| First autumn frost | 3 October | n/a | 9 October | n/a | +4.9 days per decade |
| Growing days | 145 days | n/a | 148 days | n/a | +8.9 days per decade |
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.
Rainfall Return Levels
50 years, 1943 to 1994A day with at least 30.3 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 83.9 mm (3.3 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 30.3 mm (1.2 in) | |
| 5 years | 41.9 mm (1.6 in) | |
| 10 years | 50.6 mm (2.0 in) | |
| 25 years | 62.8 mm (2.5 in) | |
| 50 years | 72.9 mm (2.9 in) | |
| 100 years | 83.9 mm (3.3 in) | Longer than the 50 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, 50 years of values from 1943 to 1994.
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: 99.1 mm (3.9 in) in 1994; 65.3 mm (2.6 in) in 1972; 57.7 mm (2.3 in) in 1945.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2025-12-31).