February
Other strong months: November and December
94/100 weather score
United States · 1991–2020
Best time to visit
San Juan
For San Juan, February has the most comfortable weather in our climate comparison. Typical daytime highs are 24.9°C, nights average 13°C, and rainfall totals about 17 mm. Figures use measured 1991–2020 normals from the nearest eligible NOAA station.
Best all-round monthFebruary
Typical daytime high24.9°C
Typical night-time low13°C
February rainfall17 mm
January
Other strong months: December and February
91/100 weather score
Make the answer personal
Choose the weather
that suits you.
Set the daytime temperature and rainfall you are comfortable with. We will show only the months that meet every choice, using the measured 1991–2020 averages below.
5 months fit your choices for San Juan
The lowest comfort score is 36 out of 100. August and September share that score. In August, that is mainly because days average 37.2°C, 13° above the 24°C the score treats as ideal.
Quick answers
Planning a trip to San Juan?
These answers come from the same measured monthly climate record shown on this page.
When is the best time to visit San Juan?
February is the strongest all-round choice in our temperature-and-rainfall comparison, with a typical daytime high of 24.9°C and 17 mm of rain.
What is the hottest month in San Juan?
August is hottest in this record, with a typical daytime high of 37.2°C and a night-time low of 25.4°C.
Which month has the least rain?
February has the lowest monthly rainfall total at 17 mm.
Is this a weather forecast?
No. These are long-term measured averages from 1991–2020. Check a current forecast before you travel.
Month by month
See how the weather
changes through the year.
The bars combine daytime temperature, night-time temperature and rainfall. The figures are measured historical averages, not a forecast for a particular trip.
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 22.3°C | 10.7°C | 21 mm | 3.6 | 10 h 40 | 86 | Strong coverage |
| February | 24.9°C | 13°C | 17 mm | 2.5 | 11 h 14 | 94 | Strong coverage |
| March | 27.9°C | 16.3°C | 29 mm | 2.7 | 11 h 56 | 85 | Strong coverage |
| April | 31°C | 19.5°C | 34 mm | 2.6 | 12 h 45 | 69 | Strong coverage |
| May | 33.5°C | 22.7°C | 50 mm | 3.2 | 13 h 25 | 52 | Strong coverage |
| June | 35.9°C | 24.8°C | 69 mm | 3.7 | 13 h 46 | 38 | Strong coverage |
| July | 36.6°C | 25.3°C | 53 mm | 3.6 | 13 h 38 | 37 | Strong coverage |
| August | 37.2°C | 25.4°C | 45 mm | 3.8 | 13 h 03 | 36 | Strong coverage |
| September | 34.2°C | 23.5°C | 116 mm | 6.7 | 12 h 17 | 36 | Strong coverage |
| October | 31.4°C | 19.7°C | 53 mm | 4.3 | 11 h 30 | 63 | Strong coverage |
| November | 26.5°C | 15°C | 30 mm | 3.4 | 10 h 50 | 91 | Strong coverage |
| December | 22.9°C | 11.6°C | 28 mm | 3.7 | 10 h 30 | 89 | Strong coverage |
What has changed
Recent daytime highs are
1.9°C warmer in San Juan.
Each bar shows the difference between the 2011–2025 average daytime high and the 1961–1990 average for the same month at the same station. A blank month does not have enough older observations for a reliable comparison.
Jan
+2.2
Feb
+2.4
Mar
+1.7
Apr
+1.2
May
+1.8
Jun
+2.0
Jul
+1.4
Aug
+2.4
Sep
+1.9
Oct
+2.3
Nov
+1.0
Dec
+2.2
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 35.6°C21 Jan 2017 | -10.6°C12 Jan 1962 | 64 mm18 Jan 1978 | 118 mm1973 · driest 0 mm in 1996 | 66 |
| February | 38.3°C27 Feb 2009 | -5.5°C15 Feb 2021 | 102 mm25 Feb 1983 | 133 mm1983 · driest 0 mm in 1962 | 66 |
| March | 40.6°C27 Mar 1984 | -0.6°C2 Mar 1980 | 208 mm27 Mar 2025 | 232 mm2025 · driest 0 mm in 2013 | 66 |
| April | 42.8°C6 Apr 2022 | 4.4°C8 Apr 2007 | 84 mm21 Apr 1966 | 150 mm1992 · driest 0 mm in 1983 | 66 |
| May | 43.9°C9 May 2024 | 10.6°C3 May 2004 | 109 mm3 May 1981 | 201 mm1966 · driest 0 mm in 1998 | 66 |
| June | 43.9°C22 Jun 2017 | 15.0°C3 Jun 1970 | 169 mm30 Jun 2010 | 271 mm2010 · driest 0 mm in 1980 | 66 |
| July | 42.8°C24 Jul 2018 | 20.0°C15 Jul 1975 | 118 mm7 Jul 2021 | 227 mm2007 · driest 0 mm in 1969 | 66 |
| August | 42.2°C10 Aug 1988 | 17.8°C13 Aug 1967 | 239 mm10 Aug 1980 | 241 mm1980 · driest 0 mm in 1964 | 65 |
| September | 42.2°C4 Sep 2011 | 12.2°C30 Sep 2020 | 225 mm14 Sep 1973 | 285 mm2014 · driest 0 mm in 1996 | 65 |
| October | 40.0°C18 Oct 2012 | 5.0°C31 Oct 1993 | 185 mm15 Oct 1966 | 269 mm1966 · driest 0 mm in 2010 | 64 |
| November | 38.9°C4 Nov 1988 | 0.0°C28 Nov 1992 | 104 mm16 Nov 2001 | 106 mm2001 · driest 0 mm in 1981 | 65 |
| December | 35.6°C5 Dec 1977 | -7.8°C23 Dec 1989 | 74 mm16 Dec 2009 | 127 mm2009 · driest 0 mm in 1961 | 65 |
| Month | Days 25°C+ | Days 30°C+ | Heavy rain (10 mm+) |
|---|---|---|---|
| January | 12 | 2 | <1 |
| February | 17 | 6 | <1 |
| March | 24 | 13 | <1 |
| April | 28 | 21 | 1 |
| May | 31 | 28 | 2 |
| June | 30 | 29 | 2 |
| July | 31 | 30 | 1 |
| August | 31 | 31 | 1 |
| September | 30 | 28 | 3 |
| October | 29 | 23 | 1 |
| November | 21 | 10 | <1 |
| December | 14 | 3 | <1 |
The best month has moved. On the 1961–1990 numbers the strongest month here was November (scoring 93); on 2011–2025 it is December (96). Both are scored the same way, from the same station — only the climate underneath changed.
| Month | Dry days reaching 20°C | Wet days | Days with heavy rain | Weeks with 3+ wet days | Typical high by year |
|---|---|---|---|---|---|
| January | 61% | 13% | 2% | 11% | 17.6–24.9°C |
| February | 73% | 11% | 2% | 6% | 20.8–27.9°C |
| March | 88% | 7% | 2% | 5% | 25.2–30.1°C |
| April | 90% | 9% | 3% | 7% | 28.8–32.6°C |
| May | 87% | 13% | 6% | 10% | 31.1–34.9°C |
| June | 86% | 14% | 6% | 14% | 33.2–36.7°C |
| July | 88% | 12% | 4% | 9% | 33.8–38.3°C |
| August | 87% | 13% | 4% | 12% | 34.6–38.7°C |
| September | 79% | 21% | 10% | 21% | 32.0–36.0°C |
| October | 86% | 13% | 5% | 9% | 29.2–32.7°C |
| November | 81% | 11% | 3% | 9% | 23.6–29.0°C |
| December | 67% | 12% | 3% | 10% | 19.5–25.6°C |
A dry day reaching 20°C records under 1 mm of rain. A wet day records at least 1 mm, while a heavy-rain day records at least 10 mm. The weekly figure is the share of seven-day periods containing three or more wet days. The final column shows the middle 80% of average daytime highs recorded for that month in individual years; a wider range means conditions have varied more from one year to another.
The evidence behind this page
Where these figures
come from.
- Place identity
- GeoNames 4726440
- NOAA station
- USW00012959 · MCALLEN MILLER INTL AP
- Station distance
- 9 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 28 usable years
- Daylight
- Calculated from latitude 26.19°, 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.
Next step
Choose your month.
Then plan the details.
The weather comparison for San Juan is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
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