Santa Ana weather in December
In December, Santa Ana sees average daytime highs of 30°C and overnight lows near 19°C, with 6 mm of rain across 1.1 wet days and about 11.2 hours of daylight. It is the 9th-warmest and 10th-wettest month of the year here.
Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 75% of the time in December, and the air most often feels humid.
Daylight stretches from about 11 h 12 min at the start of December to 11 h 12 min by month's end. Set against the rest of the year, December is Santa Ana's 3rd-clearest and 2nd-windiest month. For the whole year in context, see Santa Ana's year-round climate.
- Daytime high
- 30°
- 9th warmest
- Overnight low
- 19°
- 2nd coldest
- Rainfall
- 6 mm
- 1.1 wet days
- Daylight
- 11 h 12 min
- 6:19 AM – 5:30 PM
- Cloud cover
- 27%
- 3rd clearest
- Wind
- 10 km/h
- 2nd windiest
- Solar energy
- 5.14 kWh/m²
- Travel score
- 6.5
- out of 10
Santa Ana is city in El Salvador.
- Density
- 442/km²
- people per km²
- Founded
- 1569
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in December
Day-to-day highs hold fairly steady near 30°C through the month.
A typical December day in Santa Ana reaches about 30°C in the afternoon and slips back to 19°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 32°C. Set against its neighbours, December runs on par with November and on par with January.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 |
| Avg low (°C) | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 30 | 19 |
| 2 | 30 | 19 |
| 3 | 30 | 19 |
| 4 | 30 | 19 |
| 5 | 30 | 19 |
| 6 | 30 | 19 |
| 7 | 30 | 19 |
| 8 | 30 | 19 |
| 9 | 30 | 19 |
| 10 | 30 | 19 |
| 11 | 30 | 19 |
| 12 | 30 | 19 |
| 13 | 30 | 19 |
| 14 | 30 | 19 |
| 15 | 30 | 19 |
| 16 | 30 | 19 |
| 17 | 30 | 19 |
| 18 | 30 | 19 |
| 19 | 30 | 19 |
| 20 | 30 | 18 |
| 21 | 30 | 18 |
| 22 | 30 | 18 |
| 23 | 30 | 18 |
| 24 | 30 | 18 |
| 25 | 30 | 18 |
| 26 | 30 | 18 |
| 27 | 30 | 18 |
| 28 | 30 | 18 |
| 29 | 30 | 18 |
| 30 | 30 | 18 |
| 31 | 30 | 18 |
How December really feels in Santa Ana
Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Santa Ana weather by month
How December compares with the rest of the year at a glance. December is the 9th-warmest and 10th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 30° / 18° | 2 | 0.4 | 11.3 | 6.5 |
| Feb | 31° / 19° | 1 | 0.3 | 11.5 | 5.7 |
| Mar | 32° / 20° | 6 | 1.6 | 11.9 | 4.9 |
| Apr | 33° / 21° | 31 | 7.2 | 12.3 | 3.9 |
| May | 31° / 21° | 139 | 20.5 | 12.6 | 3.2 |
| Jun | 30° / 21° | 186 | 24.1 | 12.8 | 3.2 |
| Jul | 31° / 21° | 97 | 15.8 | 12.7 | 3.7 |
| Aug | 31° / 21° | 122 | 20.2 | 12.5 | 3.3 |
| Sep | 30° / 21° | 213 | 25.7 | 12.1 | 3.1 |
| Oct | 29° / 20° | 157 | 18.6 | 11.7 | 4.2 |
| Nov | 30° / 19° | 27 | 4.3 | 11.4 | 5.9 |
| Dec | 30° / 19° | 6 | 1.1 | 11.2 | 6.5 |
Cloud cover in December
The sky is clear or mostly clear about 75% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 12%. Skies tend to open up as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 80 | 80 | 82 | 83 | 85 | 85 | 86 | 88 | 88 | 89 | 89 | 89 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 |
| Cloudier (%) | 20 | 20 | 18 | 17 | 15 | 15 | 14 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 80 | 20 |
| 2 | 80 | 20 |
| 3 | 82 | 18 |
| 4 | 83 | 17 |
| 5 | 85 | 15 |
| 6 | 85 | 15 |
| 7 | 86 | 14 |
| 8 | 88 | 12 |
| 9 | 88 | 12 |
| 10 | 89 | 11 |
| 11 | 89 | 11 |
| 12 | 89 | 11 |
| 13 | 90 | 10 |
| 14 | 90 | 10 |
| 15 | 90 | 10 |
| 16 | 90 | 10 |
| 17 | 90 | 10 |
| 18 | 90 | 10 |
| 19 | 90 | 10 |
| 20 | 90 | 10 |
| 21 | 90 | 10 |
| 22 | 90 | 10 |
| 23 | 90 | 10 |
| 24 | 90 | 10 |
| 25 | 90 | 10 |
| 26 | 90 | 10 |
| 27 | 90 | 10 |
| 28 | 90 | 10 |
| 29 | 90 | 10 |
| 30 | 90 | 10 |
| 31 | 90 | 10 |
Chance of precipitation in December
Santa Ana gets around 6 mm of rain over 1.1 wet days in December. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 3% and peaks near 6% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 6 | 6 | 5 | 5 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Rain chance (%) | |
|---|---|
| 1 | 6 |
| 2 | 6 |
| 3 | 5 |
| 4 | 5 |
| 5 | 4 |
| 6 | 4 |
| 7 | 4 |
| 8 | 3 |
| 9 | 3 |
| 10 | 3 |
| 11 | 3 |
| 12 | 3 |
| 13 | 3 |
| 14 | 3 |
| 15 | 3 |
| 16 | 3 |
| 17 | 3 |
| 18 | 3 |
| 19 | 3 |
| 20 | 3 |
| 21 | 3 |
| 22 | 3 |
| 23 | 3 |
| 24 | 3 |
| 25 | 3 |
| 26 | 3 |
| 27 | 3 |
| 28 | 3 |
| 29 | 3 |
| 30 | 3 |
| 31 | 3 |
Humidity in December
Most of December feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, December lands in the humid band about 58% of days. Sticky, muggy-or-worse air turns up on roughly 5% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| Comfortable (%) | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 25 | 25 | 26 | 27 | 28 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 37 | 38 | 38 | 38 | 39 | 39 | 40 | 40 |
| Humid (%) | 60 | 61 | 62 | 61 | 62 | 63 | 63 | 64 | 62 | 63 | 62 | 62 | 61 | 60 | 60 | 59 | 58 | 57 | 56 | 55 | 55 | 54 | 53 | 53 | 52 | 52 | 53 | 52 | 52 | 51 | 51 |
| Muggy (%) | 13 | 12 | 11 | 10 | 9 | 8 | 8 | 7 | 7 | 6 | 6 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 4 | 23 | 60 | 13 |
| 2 | 4 | 23 | 61 | 12 |
| 3 | 4 | 23 | 62 | 11 |
| 4 | 5 | 24 | 61 | 10 |
| 5 | 5 | 24 | 62 | 9 |
| 6 | 5 | 24 | 63 | 8 |
| 7 | 5 | 24 | 63 | 8 |
| 8 | 5 | 24 | 64 | 7 |
| 9 | 6 | 25 | 62 | 7 |
| 10 | 6 | 25 | 63 | 6 |
| 11 | 6 | 26 | 62 | 6 |
| 12 | 6 | 27 | 62 | 5 |
| 13 | 6 | 28 | 61 | 5 |
| 14 | 7 | 28 | 60 | 5 |
| 15 | 7 | 29 | 60 | 4 |
| 16 | 7 | 30 | 59 | 4 |
| 17 | 7 | 31 | 58 | 4 |
| 18 | 7 | 32 | 57 | 4 |
| 19 | 7 | 33 | 56 | 4 |
| 20 | 7 | 34 | 55 | 4 |
| 21 | 7 | 35 | 55 | 3 |
| 22 | 7 | 36 | 54 | 3 |
| 23 | 7 | 37 | 53 | 3 |
| 24 | 7 | 37 | 53 | 3 |
| 25 | 7 | 38 | 52 | 3 |
| 26 | 7 | 38 | 52 | 3 |
| 27 | 7 | 38 | 53 | 2 |
| 28 | 7 | 39 | 52 | 2 |
| 29 | 7 | 39 | 52 | 2 |
| 30 | 7 | 40 | 51 | 2 |
| 31 | 7 | 40 | 51 | 2 |
Wind in December
Winds average 10 km/h in December.
Across December, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 10 | calm |
| 2 | 10 | calm |
| 3 | 10 | calm |
| 4 | 10 | calm |
| 5 | 10 | calm |
| 6 | 10 | calm |
| 7 | 10 | calm |
| 8 | 10 | calm |
| 9 | 10 | calm |
| 10 | 10 | calm |
| 11 | 10 | calm |
| 12 | 10 | calm |
| 13 | 10 | calm |
| 14 | 10 | calm |
| 15 | 10 | calm |
| 16 | 10 | calm |
| 17 | 10 | calm |
| 18 | 10 | calm |
| 19 | 10 | calm |
| 20 | 10 | calm |
| 21 | 10 | calm |
| 22 | 10 | calm |
| 23 | 10 | calm |
| 24 | 10 | calm |
| 25 | 10 | calm |
| 26 | 10 | calm |
| 27 | 10 | calm |
| 28 | 10 | calm |
| 29 | 10 | calm |
| 30 | 10 | calm |
| 31 | 10 | calm |
Sunrise & sunset in December
Daylight runs from about 11 h 12 min at the start of December to 11 h 12 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 0 minutes over December. Sunrise moves from 6:11 AM to 6:26 AM, and sunset from 5:25 PM to 5:37 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 |
| Sunrise (AM) | 6:11 | 6:12 | 6:12 | 6:13 | 6:13 | 6:14 | 6:14 | 6:15 | 6:15 | 6:16 | 6:16 | 6:17 | 6:17 | 6:18 | 6:19 | 6:19 | 6:20 | 6:20 | 6:21 | 6:21 | 6:22 | 6:22 | 6:22 | 6:23 | 6:23 | 6:24 | 6:24 | 6:25 | 6:25 | 6:25 | 6:26 |
| Sunset (PM) | 5:25 | 5:25 | 5:25 | 5:26 | 5:26 | 5:26 | 5:27 | 5:27 | 5:27 | 5:27 | 5:28 | 5:28 | 5:29 | 5:29 | 5:29 | 5:30 | 5:30 | 5:31 | 5:31 | 5:31 | 5:32 | 5:32 | 5:33 | 5:33 | 5:34 | 5:34 | 5:35 | 5:35 | 5:36 | 5:36 | 5:37 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.2 | 6:11 | 5:25 |
| 2 | 11.2 | 6:12 | 5:25 |
| 3 | 11.2 | 6:12 | 5:25 |
| 4 | 11.2 | 6:13 | 5:26 |
| 5 | 11.2 | 6:13 | 5:26 |
| 6 | 11.2 | 6:14 | 5:26 |
| 7 | 11.2 | 6:14 | 5:27 |
| 8 | 11.2 | 6:15 | 5:27 |
| 9 | 11.2 | 6:15 | 5:27 |
| 10 | 11.2 | 6:16 | 5:27 |
| 11 | 11.2 | 6:16 | 5:28 |
| 12 | 11.2 | 6:17 | 5:28 |
| 13 | 11.2 | 6:17 | 5:29 |
| 14 | 11.2 | 6:18 | 5:29 |
| 15 | 11.2 | 6:19 | 5:29 |
| 16 | 11.2 | 6:19 | 5:30 |
| 17 | 11.2 | 6:20 | 5:30 |
| 18 | 11.2 | 6:20 | 5:31 |
| 19 | 11.2 | 6:21 | 5:31 |
| 20 | 11.2 | 6:21 | 5:31 |
| 21 | 11.2 | 6:22 | 5:32 |
| 22 | 11.2 | 6:22 | 5:32 |
| 23 | 11.2 | 6:22 | 5:33 |
| 24 | 11.2 | 6:23 | 5:33 |
| 25 | 11.2 | 6:23 | 5:34 |
| 26 | 11.2 | 6:24 | 5:34 |
| 27 | 11.2 | 6:24 | 5:35 |
| 28 | 11.2 | 6:25 | 5:35 |
| 29 | 11.2 | 6:25 | 5:36 |
| 30 | 11.2 | 6:25 | 5:36 |
| 31 | 11.2 | 6:26 | 5:37 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 5.14 kWh/m².
For context, solar energy here swings from a low near 4.7 kWh/m² to a high of 6.27 kWh/m² in March across the year — December's 5.14 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.1 | Bright |
| 2 | 5.1 | Bright |
| 3 | 5.1 | Bright |
| 4 | 5.1 | Bright |
| 5 | 5.1 | Bright |
| 6 | 5.1 | Bright |
| 7 | 5.1 | Bright |
| 8 | 5.1 | Bright |
| 9 | 5.1 | Bright |
| 10 | 5.1 | Bright |
| 11 | 5.1 | Bright |
| 12 | 5.1 | Bright |
| 13 | 5.1 | Bright |
| 14 | 5.1 | Bright |
| 15 | 5.1 | Bright |
| 16 | 5.1 | Bright |
| 17 | 5.1 | Bright |
| 18 | 5.1 | Bright |
| 19 | 5.1 | Bright |
| 20 | 5.1 | Bright |
| 21 | 5.1 | Bright |
| 22 | 5.1 | Bright |
| 23 | 5.1 | Bright |
| 24 | 5.2 | Bright |
| 25 | 5.2 | Bright |
| 26 | 5.2 | Bright |
| 27 | 5.2 | Bright |
| 28 | 5.2 | Bright |
| 29 | 5.2 | Bright |
| 30 | 5.2 | Bright |
| 31 | 5.2 | Bright |
Hazard calendar for Santa Ana
None of Santa Ana's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Santa Ana sits in the Atlantic hurricane belt; the season peaks August–October.
Santa Ana's monsoon runs May–October, when most of the year's rain falls.
Is December a good time to visit Santa Ana?
Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
December is a reasonable time to visit Santa Ana for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Santa Ana in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Santa Ana sees daytime highs around 30°C and nights near 19°C. Pack light clothes. Worth having: sun protection.
Sea temperature near Santa Ana in December
The nearest coast averages about 29°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 53 km away) is warmest in August at about 30°C and coldest in January near 28°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 28 | 28 | 29 | 30 | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 29 |
| Comfort | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Tropical |
| Feb | 28 | Tropical |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 30 | Tropical |
| Jun | 30 | Tropical |
| Jul | 30 | Tropical |
| Aug | 30 | Tropical |
| Sep | 30 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 29 | Tropical |
UV index in Santa Ana in December
Clear-sky midday UV in December peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Santa Ana peaks around April 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 23 at about 9 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 10 | 13 | 13 | 14 | 12 | 13 | 13 | 12 | 12 | 11 | 9 | 9 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Very high |
| Feb | 13 | Extreme |
| Mar | 13 | Extreme |
| Apr | 14 | Extreme |
| May | 12 | Extreme |
| Jun | 13 | Extreme |
| Jul | 13 | Extreme |
| Aug | 12 | Extreme |
| Sep | 12 | Extreme |
| Oct | 11 | Extreme |
| Nov | 9 | Very high |
| Dec | 9 | Very high |
Air quality in Santa Ana in December
Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.
Air quality in Santa Ana is worst in April — around 33 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 16 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 16 | 18 | 21 | 33 | 31 | 21 | 23 | 20 | 19 | 18 | 16 | 16 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 16 | Moderate |
| Feb | 18 | Moderate |
| Mar | 21 | Moderate |
| Apr | 33 | Moderate |
| May | 31 | Moderate |
| Jun | 21 | Moderate |
| Jul | 23 | Moderate |
| Aug | 20 | Moderate |
| Sep | 19 | Moderate |
| Oct | 18 | Moderate |
| Nov | 16 | Moderate |
| Dec | 16 | Moderate |
Where is Santa Ana?
Santa Ana sits at 14.0°N, 89.6°W, 645 m above sea level, in El Salvador. The nearest listed city is Chalchuapa, 13 km away.
Topography around Santa Ana
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santa Ana.
Within 3 km, the terrain around Santa Ana has significant variations in elevation — a maximum elevation change of 387 m around an average of 683 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,989 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,703 m.
The land around Santa Ana is covered by trees (55%) and artificial surfaces (37%) within 3 km, trees (64%) and grassland (20%) within 16 km, and trees (52%) and grassland (23%) within 80 km.
El Salvador travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B
- 115 V · 60 Hz
- Prices
- ≈ 41% of US
- price level, 2025
- GDP per capita
- $5,767
- 2025
- Happiness
- 6.6 / 10
- World Happiness, 2025
- Homicide rate
- 7.9
- per 100k, 2022
- Road deaths
- 20.9
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Moderate
- EF EPI 523
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Santa Ana (13.9883°, -89.5568°, elevation 645 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).