July
July · August · June
Canada · 1991–2020
July leads for comfortable weather in Arizona: typically 25.2°C by day, 11.9°C at night, with 68 mm of rain. Based on measured 1991–2020 NOAA station history.
July · August · June
July · August · June
September · June · August
The weakest month is January, scoring 5 against July’s 82 — days reach only -10.7°C, 35° below the 24°C the score treats as ideal.
Month by month
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | -10.7°C | -21.4°C | 13 mm | 4.1 | 8 h 32 | 5 | Strong coverage |
| February | -8.2°C | -20°C | 11 mm | 3.2 | 10 h 00 | 5 | Strong coverage |
| March | -1.1°C | -12.5°C | 23 mm | 4.3 | 11 h 43 | 5 | Strong coverage |
| April | 9.5°C | -3.1°C | 26 mm | 4.3 | 13 h 40 | 18 | Strong coverage |
| May | 17.2°C | 3.3°C | 67 mm | 7.4 | 15 h 21 | 48 | Strong coverage |
| June | 22.5°C | 10°C | 81 mm | 9.7 | 16 h 18 | 74 | Strong coverage |
| July | 25.2°C | 11.9°C | 68 mm | 7.3 | 15 h 56 | 82 | Strong coverage |
| August | 24.9°C | 10.2°C | 55 mm | 7.1 | 14 h 27 | 82 | Strong coverage |
| September | 19.7°C | 5.6°C | 45 mm | 6.2 | 12 h 32 | 65 | Strong coverage |
| October | 10.4°C | -1.1°C | 34 mm | 5.3 | 10 h 39 | 24 | Strong coverage |
| November | 0.2°C | -9.6°C | 29 mm | 4 | 8 h 58 | 5 | Strong coverage |
| December | -7.9°C | -17.8°C | 16 mm | 4.3 | 8 h 07 | 5 | Strong coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 8.2°C5 Jan 2012 | -44.2°C30 Jan 2019 | 9 mm23 Jan 2010 | 30 mm2004 · driest 3 mm in 2012 | 32 |
| February | 7.7°C22 Feb 2002 | -43.0°C1 Feb 1996 | 14 mm26 Feb 2000 | 28 mm1997 · driest 1 mm in 2012 | 32 |
| March | 23.7°C19 Mar 2012 | -40.2°C1 Mar 2014 | 33 mm27 Mar 2004 | 51 mm2006 · driest 1 mm in 2019 | 32 |
| April | 27.8°C29 Apr 2001 | -23.8°C4 Apr 1996 | 38 mm26 Apr 2024 | 71 mm2009 · driest 0 mm in 1998 | 32 |
| May | 35.5°C28 May 2026 | -12.9°C13 May 2004 | 48 mm27 May 2012 | 172 mm1999 · driest 4 mm in 1998 | 31 |
| June | 36.7°C5 Jun 2021 | -2.9°C6 Jun 2009 | 51 mm27 Jun 2001 | 136 mm2014 · driest 29 mm in 2006 | 31 |
| July | 35.9°C29 Jul 2007 | 1.3°C1 Jul 2001 | 76 mm4 Jul 2012 | 138 mm2012 · driest 10 mm in 2006 | 31 |
| August | 38.4°C17 Aug 2003 | -1.0°C20 Aug 2004 | 52 mm13 Aug 2020 | 112 mm2021 · driest 8 mm in 2011 | 31 |
| September | 36.0°C2 Sep 2023 | -9.3°C28 Sep 2002 | 63 mm21 Sep 2019 | 202 mm2019 · driest 7 mm in 2012 | 31 |
| October | 30.8°C5 Oct 2011 | -17.0°C31 Oct 2023 | 48 mm3 Oct 2016 | 91 mm2016 · driest 2 mm in 2014 | 31 |
| November | 20.2°C5 Nov 2016 | -28.7°C26 Nov 2014 | 37 mm10 Nov 1995 | 279 mm1995 · driest 0 mm in 2009 | 31 |
| December | 11.1°C4 Dec 2015 | -39.0°C31 Dec 2013 | 25 mm4 Dec 1995 | 89 mm1995 · driest 1 mm in 1994 | 31 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 31 | 0 | 4 |
| February | 0 | 0 | 28 | <1 | 5 |
| March | 0 | 0 | 29 | <1 | 4 |
| April | <1 | 0 | 22 | <1 | <1 |
| May | 4 | <1 | 8 | 3 | <1 |
| June | 10 | 2 | <1 | 3 | 0 |
| July | 16 | 3 | 0 | 2 | 0 |
| August | 15 | 4 | 0 | 2 | 0 |
| September | 6 | <1 | 3 | 1 | 0 |
| October | <1 | 0 | 18 | <1 | <1 |
| November | 0 | 0 | 28 | <1 | 3 |
| December | 0 | 0 | 30 | <1 | 5 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 14% | 0% | 8% | -13.5–-5.7°C |
| February | 0% | 12% | <1% | 7% | -12.9–-3.2°C |
| March | <1% | 13% | 2% | 7% | -5.8–4.2°C |
| April | 8% | 15% | 3% | 10% | 4.3–12.9°C |
| May | 30% | 24% | 8% | 28% | 15.6–20.5°C |
| June | 53% | 31% | 9% | 41% | 20.5–25.2°C |
| July | 72% | 23% | 7% | 21% | 23.7–27.3°C |
| August | 71% | 22% | 6% | 20% | 23.4–26.5°C |
| September | 44% | 20% | 4% | 16% | 17.5–22.1°C |
| October | 8% | 16% | 3% | 15% | 6.8–13.4°C |
| November | <1% | 13% | 2% | 7% | -4.0–5.5°C |
| December | 0% | 15% | <1% | 11% | -14.0–-2.7°C |
A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.
The evidence behind this page