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Built 2026-10-19 (19 October 2026)

Days with 50 mm (1.97 in) or more of precipitation in Phoenix

Phoenix has had days with 50 mm (1.97 in) or more of precipitation in 8 years, most in 2018 with 2. Days per year, season span, streaks and every date.

Key Facts for Phoenix

  • Phoenix has had days with 50 mm (1.97 in) or more of precipitation in 8 years, 9 days in all.
  • The most in one year was 2 days in 2018.
  • In 2025, the latest year on file, there were 1 such days.
  • The earliest first date in a year was 3 March 1983.
  • The latest last date in a year was 14 October 1988.
  • 9 years with under 90 percent of days observed are left out of these rankings.

Days per Year

8 years, 9 days
Days with 50 mm (1.97 in) or more of precipitation per year in Phoenix Days per year in Phoenix with 50 mm (1.97 in) or more of precipitation. The line is the decade average. The most was 2 in 2018. Grey bars are years with under 90 percent of days observed, left out of rankings. 011221943: 11951: 11970: 11983: 11988: 12014: 12018: 22025: 11943
Days per year in Phoenix with 50 mm (1.97 in) or more of precipitation. The line is the decade average. The most was 2 in 2018. Grey bars are years with under 90 percent of days observed, left out of rankings.
Days with 50 mm (1.97 in) or more of precipitation per year in Phoenix
YearDaysDecade average
194311
195111
197011
198311
198811
201411.5
201821.5
202511

Season Span

earliest 3 March, latest 14 October
First to last qualifying date each year in Phoenix For each year, a bar from the first to the last day in Phoenix meeting 50 mm (1.97 in). Long bars mean a long season. 1943: 3 August 1943 to 3 August 19431951: 27 August 1951 to 27 August 19511970: 5 September 1970 to 5 September 19701983: 3 March 1983 to 3 March 19831988: 14 October 1988 to 14 October 19882014: 8 September 2014 to 8 September 20142018: 2 October 2018 to 13 October 20182025: 12 October 2025 to 12 October 202519431951197019831988201420182025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day in Phoenix meeting 50 mm (1.97 in). Long bars mean a long season.
First to last qualifying date each year in Phoenix
YearFirst dateLast date
19431943-08-031943-08-03
19511951-08-271951-08-27
19701970-09-051970-09-05
19831983-03-031983-03-03
19881988-10-141988-10-14
20142014-09-082014-09-08
20182018-10-022018-10-13
20252025-10-122025-10-12

Every Year

Days with 50 mm (1.97 in) or more of precipitation per year in Phoenix
YearDaysFirst dateLast dateLongest streak in yearCoverage
2025112 October 202512 October 20251 daysComplete
201822 October 201813 October 20181 daysComplete
201418 September 20148 September 20141 daysComplete
1988114 October 198814 October 19881 daysComplete
198313 March 19833 March 19831 daysComplete
197015 September 19705 September 19701 daysComplete
1951127 August 195127 August 19511 daysComplete
194313 August 19433 August 19431 daysComplete
Decade averages for Days with 50 mm (1.97 in) or more of precipitation in Phoenix
DecadeAverage days per yearYears counted
1940s1.01
1950s1.01
1970s1.01
1980s1.02
2010s1.52
2020s1.01

Compare with your own threshold in the threshold explorer. Fahrenheit thresholds are converted to tenths of a degree Celsius once, rounding half up.

Download the Data

  • Data for Days with 50 mm (1.97 in) or more of precipitation in Phoenix, 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site from the threaded city record.

Data as of . Last revised (2026-10-17).