December
December · January · February
Mexico · 1991–2020
December leads for comfortable weather in Santa Ana: typically 29.5°C by day, 9.7°C at night, with 18 mm of rain. Based on measured 1991–2020 NOAA station history.
December · January · February
October · December · November
December · January · February
The weakest month is July, scoring 8 against December’s 72 — days average 37.6°C, 14° above 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 | 29.8°C | 8.6°C | 13 mm | 1.4 | 10 h 38 | 69 | Good coverage |
| February | 31.5°C | 10.2°C | 20 mm | 1 | 11 h 13 | 67 | Good coverage |
| March | 34.2°C | 11.6°C | 5 mm | 0.5 | 11 h 56 | 60 | Good coverage |
| April | 36.7°C | 14°C | 3 mm | 0.3 | 12 h 45 | 56 | Good coverage |
| May | 39.2°C | 17.6°C | 2 mm | 0.4 | 13 h 26 | 45 | Good coverage |
| June | 40.7°C | 23.3°C | 61 mm | 3.7 | 13 h 48 | 26 | Good coverage |
| July | 37.6°C | 23.5°C | 195 mm | 13.7 | 13 h 39 | 8 | Good coverage |
| August | 36.2°C | 23.1°C | 187 mm | 12 | 13 h 04 | 16 | Good coverage |
| September | 35.8°C | 22.5°C | 106 mm | 8 | 12 h 17 | 33 | Good coverage |
| October | 36.5°C | 18.2°C | 31 mm | 2.4 | 11 h 29 | 53 | Good coverage |
| November | 33.8°C | 13.2°C | 14 mm | 1.5 | 10 h 48 | 64 | Good coverage |
| December | 29.5°C | 9.7°C | 18 mm | 1.5 | 10 h 29 | 72 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 40.7°C30 Jan 2024 | 0.1°C22 Jan 1988 | 74 mm30 Jan 1984 | 81 mm2004 · driest 0 mm in 1988 | 38 |
| February | 41.8°C24 Feb 2009 | 1.2°C4 Feb 2016 | 79 mm6 Feb 2005 | 112 mm2005 · driest 0 mm in 1994 | 36 |
| March | 40.9°C17 Mar 2007 | 5.1°C2 Mar 2007 | 48 mm10 Mar 2014 | 48 mm2014 · driest 0 mm in 1979 | 36 |
| April | 44.5°C13 Apr 2006 | 7.5°C6 Apr 2003 | 16 mm1 Apr 2004 | 17 mm2004 · driest 0 mm in 1994 | 33 |
| May | 45.4°C27 May 2018 | 4.8°C19 May 2026 | 16 mm19 May 2009 | 18 mm2009 · driest 0 mm in 1988 | 35 |
| June | 48.7°C6 Jun 2016 | 10.0°C2 Jun 2026 | 85 mm23 Jun 2024 | 220 mm2014 · driest 0 mm in 1989 | 32 |
| July | 46.2°C2 Jul 2010 | 15.8°C5 Jul 1996 | 89 mm27 Jul 2005 | 294 mm2013 · driest 0 mm in 1998 | 36 |
| August | 45.3°C26 Aug 2010 | 16.0°C29 Aug 1978 | 113 mm19 Aug 2015 | 473 mm1989 · driest 8 mm in 1978 | 34 |
| September | 45.8°C27 Sep 2024 | 15.4°C30 Sep 2011 | 131 mm20 Sep 2022 | 273 mm2014 · driest 16 mm in 1981 | 34 |
| October | 44.5°C25 Oct 2017 | 7.5°C28 Oct 2020 | 83 mm4 Oct 2009 | 153 mm2009 · driest 0 mm in 2007 | 32 |
| November | 42.1°C14 Nov 2017 | 0.0°C23 Nov 1979 | 56 mm27 Nov 1990 | 83 mm2019 · driest 0 mm in 2006 | 39 |
| December | 38.8°C3 Dec 2003 | -0.3°C28 Dec 2015 | 55 mm29 Dec 1990 | 99 mm2007 · driest 0 mm in 2010 | 34 |
| Month | Days 25°C+ | Days 30°C+ | Heavy rain (10 mm+) |
|---|---|---|---|
| January | 19 | 11 | <1 |
| February | 18 | 13 | <1 |
| March | 21 | 19 | <1 |
| April | 23 | 22 | 0 |
| May | 23 | 23 | <1 |
| June | 25 | 25 | 2 |
| July | 23 | 23 | 5 |
| August | 24 | 23 | 4 |
| September | 23 | 23 | 3 |
| October | 24 | 23 | <1 |
| November | 22 | 19 | <1 |
| December | 19 | 10 | <1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 95% | 5% | 2% | 1% | 25.7–31.4°C |
| February | 96% | 5% | 2% | 2% | 28.4–33.7°C |
| March | 99% | 2% | <1% | 0% | 30.9–35.6°C |
| April | 99% | <1% | <1% | 0% | 34.7–38.2°C |
| May | 99% | 1% | <1% | 0% | 37.0–40.3°C |
| June | 88% | 12% | 6% | 17% | 38.8–41.5°C |
| July | 56% | 43% | 19% | 65% | 34.9–39.4°C |
| August | 59% | 39% | 18% | 57% | 34.4–37.4°C |
| September | 75% | 25% | 10% | 24% | 33.6–38.7°C |
| October | 93% | 8% | 4% | 4% | 34.1–38.6°C |
| November | 95% | 5% | 2% | 2% | 30.8–35.9°C |
| December | 94% | 6% | 2% | 1% | 26.5–31.5°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