San Luis weather in April
In April, San Luis sees average daytime highs of 87°F and overnight lows near 61°F, with 0.1 in of rain across 0.6 wet days and about 12.8 hours of daylight. It is the 7th-warmest and 10th-wettest month of the year here.
Highs climb over the month, from about 84°F in the first days to 91°F by the end. The sky is clear or mostly clear about 78% of the time in April, and the air most often feels dry.
Daylight stretches from about 12 h 18 min at the start of April to 13 h 12 min by month's end. Set against the rest of the year, April is San Luis's 5th-clearest and 2nd-windiest month. For the whole year in context, see San Luis's year-round climate.
- Daytime high
- 87°
- 7th warmest
- Overnight low
- 61°
- 6th coldest
- Rainfall
- 0.1 in
- 0.6 wet days
- Daylight
- 12 h 48 min
- 6:15 AM – 7:03 PM
- Cloud cover
- 21%
- 5th clearest
- Wind
- 7 mph
- 2nd windiest
- Solar energy
- 7.55 kWh/m²
- Travel score
- 6.1
- out of 10
San Luis is city in Yuma County, Arizona, United States.
- Density
- 356/km²
- people per km²
- Founded
- 1930
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in April
Highs climb over the month, from about 84°F in the first days to 91°F by the end.
A typical April day in San Luis reaches about 87°F in the afternoon and slips back to 61°F overnight — a 26°F spread between the day's warmth and the night's chill. On most days the high lands between 77°F and 96°F. Set against its neighbours, April runs about 6°F warmer than March and about 7°F cooler than May.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 84 | 84 | 84 | 84 | 84 | 85 | 85 | 85 | 85 | 86 | 86 | 86 | 86 | 87 | 87 | 87 | 88 | 88 | 88 | 89 | 89 | 89 | 90 | 90 | 90 | 91 | 91 | 91 | 91 | 92 |
| Avg low (°F) | 58 | 58 | 58 | 59 | 59 | 59 | 59 | 59 | 59 | 60 | 60 | 60 | 60 | 60 | 61 | 61 | 61 | 61 | 62 | 62 | 62 | 62 | 63 | 63 | 63 | 64 | 64 | 64 | 64 | 65 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 84 | 58 |
| 2 | 84 | 58 |
| 3 | 84 | 58 |
| 4 | 84 | 59 |
| 5 | 84 | 59 |
| 6 | 85 | 59 |
| 7 | 85 | 59 |
| 8 | 85 | 59 |
| 9 | 85 | 59 |
| 10 | 86 | 60 |
| 11 | 86 | 60 |
| 12 | 86 | 60 |
| 13 | 86 | 60 |
| 14 | 87 | 60 |
| 15 | 87 | 61 |
| 16 | 87 | 61 |
| 17 | 88 | 61 |
| 18 | 88 | 61 |
| 19 | 88 | 62 |
| 20 | 89 | 62 |
| 21 | 89 | 62 |
| 22 | 89 | 62 |
| 23 | 90 | 63 |
| 24 | 90 | 63 |
| 25 | 90 | 63 |
| 26 | 91 | 64 |
| 27 | 91 | 64 |
| 28 | 91 | 64 |
| 29 | 91 | 64 |
| 30 | 92 | 65 |
How April really feels in San Luis
Once humidity and wind are folded in, April averages 8 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.
The story in April is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
San Luis weather by month
How April compares with the rest of the year at a glance. April is the 7th-warmest and 10th-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 71° / 49° | 0.4 | 1.5 | 10.1 | 8.4 |
| Feb | 74° / 52° | 0.5 | 2.3 | 10.8 | 8.6 |
| Mar | 81° / 56° | 0.4 | 1.5 | 11.8 | 8.1 |
| Apr | 87° / 61° | 0.1 | 0.6 | 12.8 | 6.1 |
| May | 95° / 68° | 0.0 | 0.2 | 13.6 | 3.5 |
| Jun | 103° / 75° | 0.0 | 0.2 | 14.1 | 0.7 |
| Jul | 106° / 83° | 0.2 | 1.5 | 13.9 | 0.0 |
| Aug | 106° / 84° | 0.4 | 2.9 | 13.2 | 0.0 |
| Sep | 101° / 78° | 0.5 | 2.2 | 12.2 | 1.2 |
| Oct | 91° / 67° | 0.2 | 0.9 | 11.2 | 4.9 |
| Nov | 78° / 56° | 0.2 | 0.8 | 10.3 | 8.6 |
| Dec | 69° / 48° | 0.4 | 1.7 | 9.9 | 8.2 |
Cloud cover in April
The sky is clear or mostly clear about 78% of the time in April.
Beyond those clear spells, partly cloudy skies cover about 10% of April, with mostly cloudy or overcast conditions the remaining 12%.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 84 | 84 | 85 | 85 | 85 | 85 | 86 | 86 | 86 | 86 | 86 | 86 | 87 | 87 | 87 | 88 | 88 | 88 | 89 | 89 | 89 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 91 | 91 |
| Cloudier (%) | 16 | 16 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 12 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 84 | 16 |
| 2 | 84 | 16 |
| 3 | 85 | 15 |
| 4 | 85 | 15 |
| 5 | 85 | 15 |
| 6 | 85 | 15 |
| 7 | 86 | 14 |
| 8 | 86 | 14 |
| 9 | 86 | 14 |
| 10 | 86 | 14 |
| 11 | 86 | 14 |
| 12 | 86 | 14 |
| 13 | 87 | 13 |
| 14 | 87 | 13 |
| 15 | 87 | 13 |
| 16 | 88 | 12 |
| 17 | 88 | 12 |
| 18 | 88 | 12 |
| 19 | 89 | 11 |
| 20 | 89 | 11 |
| 21 | 89 | 11 |
| 22 | 90 | 10 |
| 23 | 90 | 10 |
| 24 | 90 | 10 |
| 25 | 90 | 10 |
| 26 | 90 | 10 |
| 27 | 90 | 10 |
| 28 | 90 | 10 |
| 29 | 91 | 9 |
| 30 | 91 | 9 |
Chance of precipitation in April
San Luis gets around 0.1 in of rain over 0.6 wet days in April. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 2% and peaks near 4% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Rain chance (%) | |
|---|---|
| 1 | 4 |
| 2 | 4 |
| 3 | 3 |
| 4 | 3 |
| 5 | 3 |
| 6 | 3 |
| 7 | 3 |
| 8 | 3 |
| 9 | 2 |
| 10 | 2 |
| 11 | 2 |
| 12 | 2 |
| 13 | 2 |
| 14 | 1 |
| 15 | 1 |
| 16 | 1 |
| 17 | 1 |
| 18 | 1 |
| 19 | 1 |
| 20 | 1 |
| 21 | 1 |
| 22 | 1 |
| 23 | 1 |
| 24 | 1 |
| 25 | 1 |
| 26 | 1 |
| 27 | 1 |
| 28 | 1 |
| 29 | 1 |
| 30 | 1 |
Humidity in April
Most of April feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, April lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Comfortable (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | |
|---|---|---|
| 1 | 99 | 1 |
| 2 | 99 | 1 |
| 3 | 99 | 1 |
| 4 | 99 | 1 |
| 5 | 99 | 1 |
| 6 | 99 | 1 |
| 7 | 99 | 1 |
| 8 | 100 | 0 |
| 9 | 100 | 0 |
| 10 | 100 | 0 |
| 11 | 100 | 0 |
| 12 | 100 | 0 |
| 13 | 100 | 0 |
| 14 | 100 | 0 |
| 15 | 100 | 0 |
| 16 | 100 | 0 |
| 17 | 100 | 0 |
| 18 | 100 | 0 |
| 19 | 100 | 0 |
| 20 | 100 | 0 |
| 21 | 100 | 0 |
| 22 | 100 | 0 |
| 23 | 100 | 0 |
| 24 | 100 | 0 |
| 25 | 100 | 0 |
| 26 | 100 | 0 |
| 27 | 100 | 0 |
| 28 | 100 | 0 |
| 29 | 100 | 0 |
| 30 | 100 | 0 |
Wind in April
Winds average 7 mph in April.
Across April, daily wind ranges from about 6 mph on the calmest days to 7 mph 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| 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 |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 6 | calm |
| 2 | 6 | calm |
| 3 | 6 | calm |
| 4 | 7 | calm |
| 5 | 7 | calm |
| 6 | 7 | calm |
| 7 | 7 | calm |
| 8 | 7 | calm |
| 9 | 7 | calm |
| 10 | 7 | calm |
| 11 | 7 | calm |
| 12 | 7 | calm |
| 13 | 7 | calm |
| 14 | 7 | calm |
| 15 | 7 | calm |
| 16 | 7 | calm |
| 17 | 7 | calm |
| 18 | 7 | calm |
| 19 | 7 | calm |
| 20 | 7 | calm |
| 21 | 7 | calm |
| 22 | 7 | calm |
| 23 | 7 | calm |
| 24 | 7 | calm |
| 25 | 7 | calm |
| 26 | 7 | calm |
| 27 | 7 | calm |
| 28 | 7 | calm |
| 29 | 7 | calm |
| 30 | 7 | calm |
Sunrise & sunset in April
Daylight runs from about 12 h 18 min at the start of April to 13 h 12 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 54 minutes over April. Sunrise moves from 6:35 AM to 5:59 AM, and sunset from 6:53 PM to 7:14 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.3 | 12.3 | 12.4 | 12.4 | 12.4 | 12.5 | 12.5 | 12.5 | 12.6 | 12.6 | 12.6 | 12.7 | 12.7 | 12.7 | 12.8 | 12.8 | 12.8 | 12.9 | 12.9 | 12.9 | 13.0 | 13.0 | 13.0 | 13.1 | 13.1 | 13.1 | 13.1 | 13.2 | 13.2 | 13.2 |
| Sunrise (AM) | 6:35 | 6:33 | 6:32 | 6:31 | 6:29 | 6:28 | 6:27 | 6:26 | 6:24 | 6:23 | 6:22 | 6:20 | 6:19 | 6:18 | 6:17 | 6:15 | 6:14 | 6:13 | 6:12 | 6:11 | 6:09 | 6:08 | 6:07 | 6:06 | 6:05 | 6:04 | 6:03 | 6:02 | 6:00 | 5:59 |
| Sunset (PM) | 6:53 | 6:53 | 6:54 | 6:55 | 6:56 | 6:56 | 6:57 | 6:58 | 6:58 | 6:59 | 7:00 | 7:00 | 7:01 | 7:02 | 7:03 | 7:03 | 7:04 | 7:05 | 7:05 | 7:06 | 7:07 | 7:08 | 7:08 | 7:09 | 7:10 | 7:11 | 7:11 | 7:12 | 7:13 | 7:14 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.3 | 6:35 | 6:53 |
| 2 | 12.3 | 6:33 | 6:53 |
| 3 | 12.4 | 6:32 | 6:54 |
| 4 | 12.4 | 6:31 | 6:55 |
| 5 | 12.4 | 6:29 | 6:56 |
| 6 | 12.5 | 6:28 | 6:56 |
| 7 | 12.5 | 6:27 | 6:57 |
| 8 | 12.5 | 6:26 | 6:58 |
| 9 | 12.6 | 6:24 | 6:58 |
| 10 | 12.6 | 6:23 | 6:59 |
| 11 | 12.6 | 6:22 | 7:00 |
| 12 | 12.7 | 6:20 | 7:00 |
| 13 | 12.7 | 6:19 | 7:01 |
| 14 | 12.7 | 6:18 | 7:02 |
| 15 | 12.8 | 6:17 | 7:03 |
| 16 | 12.8 | 6:15 | 7:03 |
| 17 | 12.8 | 6:14 | 7:04 |
| 18 | 12.9 | 6:13 | 7:05 |
| 19 | 12.9 | 6:12 | 7:05 |
| 20 | 12.9 | 6:11 | 7:06 |
| 21 | 13.0 | 6:09 | 7:07 |
| 22 | 13.0 | 6:08 | 7:08 |
| 23 | 13.0 | 6:07 | 7:08 |
| 24 | 13.1 | 6:06 | 7:09 |
| 25 | 13.1 | 6:05 | 7:10 |
| 26 | 13.1 | 6:04 | 7:11 |
| 27 | 13.1 | 6:03 | 7:11 |
| 28 | 13.2 | 6:02 | 7:12 |
| 29 | 13.2 | 6:00 | 7:13 |
| 30 | 13.2 | 5:59 | 7:14 |
Solar energy in April
Average shortwave solar energy reaching the ground each day in April, about 7.55 kWh/m².
For context, solar energy here swings from a low near 3.4 kWh/m² to a high of 8.49 kWh/m² in June across the year — April's 7.55 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 7.0 | 7.0 | 7.0 | 7.1 | 7.1 | 7.2 | 7.2 | 7.3 | 7.3 | 7.4 | 7.4 | 7.4 | 7.5 | 7.5 | 7.5 | 7.6 | 7.6 | 7.7 | 7.7 | 7.7 | 7.7 | 7.8 | 7.8 | 7.8 | 7.8 | 7.9 | 7.9 | 7.9 | 8.0 | 8.0 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 7.0 | Intense |
| 2 | 7.0 | Intense |
| 3 | 7.0 | Intense |
| 4 | 7.1 | Intense |
| 5 | 7.1 | Intense |
| 6 | 7.2 | Intense |
| 7 | 7.2 | Intense |
| 8 | 7.3 | Intense |
| 9 | 7.3 | Intense |
| 10 | 7.4 | Intense |
| 11 | 7.4 | Intense |
| 12 | 7.4 | Intense |
| 13 | 7.5 | Intense |
| 14 | 7.5 | Intense |
| 15 | 7.5 | Intense |
| 16 | 7.6 | Intense |
| 17 | 7.6 | Intense |
| 18 | 7.7 | Intense |
| 19 | 7.7 | Intense |
| 20 | 7.7 | Intense |
| 21 | 7.7 | Intense |
| 22 | 7.8 | Intense |
| 23 | 7.8 | Intense |
| 24 | 7.8 | Intense |
| 25 | 7.8 | Intense |
| 26 | 7.9 | Intense |
| 27 | 7.9 | Intense |
| 28 | 7.9 | Intense |
| 29 | 8.0 | Intense |
| 30 | 8.0 | Intense |
Is April a good time to visit San Luis?
Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
April is a reasonable time to visit San Luis for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for San Luis in April
From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In April, San Luis sees daytime highs around 87°F and nights near 61°F. Pack light clothes and sun protection.
UV index in San Luis in April
Clear-sky midday UV in April peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in San Luis peaks around June 23 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 3 (moderate).
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) | 4 | 5 | 5 | 8 | 8 | 11 | 11 | 10 | 9 | 6 | 4 | 3 |
| Level | Moderate | Moderate | Moderate | Very high | Very high | Extreme | Extreme | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 4 | Moderate |
| Feb | 5 | Moderate |
| Mar | 5 | Moderate |
| Apr | 8 | Very high |
| May | 8 | Very high |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 10 | Very high |
| Sep | 9 | Very high |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 3 | Moderate |
Where is San Luis?
San Luis sits at 32.5°N, 114.8°W, 131 ft above sea level, in United States. The nearest listed city is San Luis Río Colorado, 2.5 mi away.
Topography around San Luis
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of San Luis.
Within 2 miles, the terrain around San Luis has only modest variations in elevation — a maximum elevation change of 89 ft around an average of 118 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 180 ft; within 50 miles, large variations in elevation — a maximum elevation change of 3,652 ft.
The land around San Luis is covered by artificial surfaces (46%), bare terrain (26%) and cropland (24%) within 2 miles, bare terrain (45%) and cropland (41%) within 10 miles, and bare terrain (73%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- 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 San Luis (32.487°, -114.7822°, elevation 131 ft), 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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).