Arizona Falls 1 WNW Threshold Days by Year (USC00021161)
13 fixed thresholds counted per year at Arizona Falls 1 WNW (USC00021161): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Arizona Falls 1 WNW Thresholds
- Arizona Falls 1 WNW: days with a maximum temperature at or above 30 C (86 F) in 39 years, most in 1934 with 217.
- Arizona Falls 1 WNW: days with a maximum temperature at or above 35 C (95 F) in 39 years, most in 1954 with 172.
- Arizona Falls 1 WNW: days with a maximum temperature at or above 40 C (104 F) in 39 years, most in 1958 with 94.
- Arizona Falls 1 WNW: days with a maximum temperature at or above 90 F (32.2 C) in 39 years, most in 1954 with 190.
- 13 fixed thresholds have at least one qualifying day at Arizona Falls 1 WNW.
Days at or above 30 C (86 F)
39 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1924 | 187 | 191 |
| 1925 | 191 | 191 |
| 1926 | 192 | 191 |
| 1927 | 210 | 191 |
| 1928 | 182 | 191 |
| 1929 | 184 | 191 |
| 1930 | 194 | 189.8 |
| 1931 | 199 | 189.8 |
| 1932 | 161 | 189.8 |
| 1933 | 175 | 189.8 |
| 1934 | 217 | 189.8 |
| 1935 | 170 | 189.8 |
| 1936 | 199 | 189.8 |
| 1937 | 199 | 189.8 |
| 1938 | 181 | 189.8 |
| 1939 | 203 | 189.8 |
| 1940 | 199 | 190.4 |
| 1941 | 162 | 190.4 |
| 1942 | 184 | 190.4 |
| 1943 | 199 | 190.4 |
| 1944 | 185 | 190.4 |
| 1945 | 200 | 190.4 |
| 1946 | 196 | 190.4 |
| 1947 | 205 | 190.4 |
| 1948 | 184 | 190.4 |
| 1949 | 190 | 190.4 |
| 1950 | 215 | 196.9 |
| 1951 | 180 | 196.9 |
| 1952 | 197 | 196.9 |
| 1953 | 192 | 196.9 |
| 1954 | 214 | 196.9 |
| 1955 | 201 | 196.9 |
| 1956 | 203 | 196.9 |
| 1957 | 181 | 196.9 |
| 1958 | 193 | 196.9 |
| 1959 | 193 | 196.9 |
| 1960 | 195 | 201.3 |
| 1961 | 200 | 201.3 |
| 1962 | 209 | 201.3 |
| Year | First date | Last date |
|---|---|---|
| 1924 | 1924-04-19 | 1924-11-28 |
| 1925 | 1925-03-02 | 1925-10-31 |
| 1926 | 1926-02-09 | 1926-11-30 |
| 1927 | 1927-01-04 | 1927-11-27 |
| 1928 | 1928-03-20 | 1928-11-10 |
| 1929 | 1929-03-05 | 1929-11-18 |
| 1930 | 1930-02-15 | 1930-11-11 |
| 1931 | 1931-03-21 | 1931-11-06 |
| 1932 | 1932-03-19 | 1932-11-05 |
| 1933 | 1933-04-01 | 1933-11-24 |
| 1934 | 1934-03-05 | 1934-11-15 |
| 1935 | 1935-04-12 | 1935-10-27 |
| 1936 | 1936-03-01 | 1936-11-16 |
| 1937 | 1937-04-08 | 1937-12-01 |
| 1938 | 1938-04-04 | 1938-10-30 |
| 1939 | 1939-03-15 | 1939-11-07 |
| 1940 | 1940-02-28 | 1940-11-02 |
| 1941 | 1941-04-24 | 1941-11-08 |
| 1942 | 1942-03-22 | 1942-11-10 |
| 1943 | 1943-02-14 | 1943-11-16 |
| 1944 | 1944-04-02 | 1944-11-04 |
| 1945 | 1945-03-21 | 1945-11-05 |
| 1946 | 1946-02-23 | 1946-10-26 |
| 1947 | 1947-02-13 | 1947-11-16 |
| 1948 | 1948-04-02 | 1948-10-27 |
| 1949 | 1949-04-10 | 1949-11-18 |
| 1950 | 1950-01-20 | 1950-12-10 |
| 1951 | 1951-01-25 | 1951-10-29 |
| 1952 | 1952-04-01 | 1952-11-06 |
| 1953 | 1953-03-08 | 1953-11-29 |
| 1954 | 1954-02-05 | 1954-11-22 |
| 1955 | 1955-03-08 | 1955-11-07 |
| 1956 | 1956-03-17 | 1956-11-11 |
| 1957 | 1957-02-11 | 1957-10-25 |
| 1958 | 1958-04-11 | 1958-11-10 |
| 1959 | 1959-03-09 | 1959-10-28 |
| 1960 | 1960-03-07 | 1960-11-03 |
| 1961 | 1961-03-09 | 1961-11-05 |
| 1962 | 1962-03-26 | 1962-11-13 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 39 | 217 | 1934 | 209 |
| 35 C (95 F): Days | 39 | 172 | 1954 | 135 |
| 40 C (104 F): Days | 39 | 94 | 1958 | 66 |
| 45 C (113 F): Days | 22 | 12 | 1960 | 3 |
| 90 F (32.2 C): Days | 39 | 190 | 1954 | 175 |
| 100 F (37.8 C): Days | 39 | 126 | 1958 | 103 |
| 110 F (43.3 C): Days | 37 | 36 | 1947 | 8 |
| 0 C (32 F): Frost days (min | 39 | 47 | 1948 | 11 |
| 20 C (68 F): Tropical nights (min | 39 | 114 | 1960 | 78 |
| 25 C (77 F): Days with min | 39 | 45 | 1961 | 12 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 33 | 16 | 1931 | 3 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 23 | 4 | 1941 | 1 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 5 | 1 | 1932 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1924.
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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2025-12-31).