March
March · April · November
86climate match
United States · 1991–2020
Best time to visit
Castle Hills.
March leads for comfortable weather in Castle Hills: typically 23.5°C by day, 11.2°C at night, with 59 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortMarch
Typical high23.5°C
Typical low11.2°C
Rain in March59 mm
September
September · May · April
74climate match
February
February · November · December
92climate match
The weakest month is August, scoring 41 against March’s 86 — days average 36°C, 12° above the 24°C the score treats as ideal.
Month by month
The whole year,
without the guesswork.
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
Jan
5717.7° / 5.2°
Feb
7120.1° / 7.6°
Mar
8623.5° / 11.2°
Apr
8427.2° / 14.9°
May
5630.8° / 19.5°
Jun
4433.9° / 22.9°
Jul
4235.3° / 24°
Aug
4136° / 24.1°
Sep
4932.7° / 21.1°
Oct
7428.2° / 16°
Nov
8222.3° / 10.2°
Dec
6218.4° / 6.1°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 17.7°C | 5.2°C | 50 mm | 5.3 | 10 h 26 | 57 | Strong coverage |
| February | 20.1°C | 7.6°C | 44 mm | 4.6 | 11 h 06 | 71 | Strong coverage |
| March | 23.5°C | 11.2°C | 59 mm | 5.6 | 11 h 54 | 86 | Strong coverage |
| April | 27.2°C | 14.9°C | 61 mm | 4.4 | 12 h 50 | 84 | Strong coverage |
| May | 30.8°C | 19.5°C | 112 mm | 6.3 | 13 h 37 | 56 | Strong coverage |
| June | 33.9°C | 22.9°C | 83 mm | 5.5 | 14 h 02 | 44 | Strong coverage |
| July | 35.3°C | 24°C | 61 mm | 3.9 | 13 h 52 | 42 | Strong coverage |
| August | 36°C | 24.1°C | 55 mm | 3.9 | 13 h 12 | 41 | Strong coverage |
| September | 32.7°C | 21.1°C | 99 mm | 5.7 | 12 h 18 | 49 | Strong coverage |
| October | 28.2°C | 16°C | 95 mm | 4.9 | 11 h 24 | 74 | Strong coverage |
| November | 22.3°C | 10.2°C | 53 mm | 4.4 | 10 h 38 | 82 | Strong coverage |
| December | 18.4°C | 6.1°C | 51 mm | 4.8 | 10 h 16 | 62 | Strong coverage |
What has changed
Castle Hills runs +1.4°C
on the 1961–1990 baseline.
Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.
Jan
+1.6
Feb
+1.2
Mar
+1.3
Apr
+0.8
May
+1.3
Jun
+1.5
Jul
+1.3
Aug
+2.0
Sep
+2.0
Oct
+1.5
Nov
+0.6
Dec
+1.7
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 31.7°C2 Jan 2026 | -17.8°C31 Jan 1949 | 75 mm25 Jan 2012 | 217 mm1968 · driest 0 mm in 1996 | 80 |
| February | 37.8°C21 Feb 1996 | -14.4°C2 Feb 1951 | 62 mm3 Feb 1986 | 163 mm1965 · driest 0 mm in 1999 | 80 |
| March | 37.8°C28 Mar 1971 | -7.2°C4 Mar 2002 | 89 mm28 Mar 2018 | 184 mm2007 · driest 0 mm in 2011 | 80 |
| April | 38.3°C19 Apr 1996 | -0.6°C3 Apr 1987 | 112 mm20 Apr 2026 | 237 mm1957 · driest 0 mm in 2005 | 80 |
| May | 40.0°C31 May 2004 | 5.6°C4 May 2013 | 251 mm25 May 2013 | 335 mm2013 · driest 3 mm in 2003 | 80 |
| June | 42.2°C29 Jun 2013 | 11.7°C2 Jun 1964 | 157 mm3 Jun 1951 | 304 mm1986 · driest 0 mm in 2008 | 80 |
| July | 41.7°C13 Jul 2020 | 16.7°C16 Jul 1967 | 242 mm1 Jul 2002 | 430 mm2002 · driest 0 mm in 1993 | 80 |
| August | 43.3°C28 Aug 2011 | 16.1°C25 Aug 1966 | 146 mm16 Aug 2007 | 283 mm1974 · driest 0 mm in 1952 | 79 |
| September | 43.9°C5 Sep 2000 | 7.8°C22 Sep 1983 | 166 mm26 Sep 1973 | 428 mm2018 · driest 1 mm in 1999 | 80 |
| October | 37.2°C12 Oct 1991 | -2.8°C31 Oct 1993 | 286 mm17 Oct 1998 | 459 mm1998 · driest 0 mm in 1952 | 80 |
| November | 34.4°C4 Nov 1988 | -6.1°C29 Nov 1976 | 124 mm1 Nov 1977 | 240 mm2004 · driest 0 mm in 1966 | 80 |
| December | 32.2°C25 Dec 1955 | -14.4°C23 Dec 1989 | 152 mm19 Dec 1991 | 355 mm1991 · driest 1 mm in 1950 | 80 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 3 | <1 | 5 | 1 |
| February | 7 | <1 | 3 | 1 |
| March | 14 | 2 | 1 | 2 |
| April | 23 | 8 | 0 | 2 |
| May | 30 | 21 | 0 | 3 |
| June | 30 | 28 | 0 | 2 |
| July | 31 | 30 | 0 | 2 |
| August | 31 | 30 | 0 | 1 |
| September | 29 | 26 | 0 | 3 |
| October | 25 | 13 | 0 | 2 |
| November | 12 | 1 | 1 | 2 |
| December | 4 | <1 | 4 | 1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 35% | 17% | 4% | 14% | 13.9–20.2°C |
| February | 48% | 17% | 5% | 13% | 15.9–23.3°C |
| March | 69% | 16% | 4% | 12% | 20.8–25.8°C |
| April | 81% | 17% | 7% | 15% | 24.8–29.5°C |
| May | 80% | 20% | 9% | 20% | 28.3–32.9°C |
| June | 83% | 17% | 8% | 16% | 31.7–36.1°C |
| July | 88% | 12% | 5% | 9% | 33.1–37.1°C |
| August | 87% | 13% | 5% | 11% | 33.4–37.4°C |
| September | 81% | 19% | 8% | 17% | 30.5–34.5°C |
| October | 82% | 16% | 7% | 15% | 26.0–30.1°C |
| November | 63% | 15% | 5% | 13% | 19.6–24.8°C |
| December | 41% | 15% | 4% | 14% | 16.2–20.5°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
Nearby, measured,
and named.
- Place identity
- GeoNames 4679437
- NOAA station
- USW00012921 · SAN ANTONIO INTL AP
- Station distance
- 3.9 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 30 usable years
- Daylight
- Calculated from latitude 29.52°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.