Castelar weather in May
In May, Castelar sees average daytime highs of 18°C and overnight lows near 9°C, with 62 mm of rain across 6.2 wet days and about 10.2 hours of daylight. It is the 9th-warmest and 9th-wettest month of the year here.
Highs ease over the month, from about 20°C in the first days to 17°C by the end. The sky is clear or mostly clear about 36% of the time in May, and the air most often feels dry.
Daylight stretches from about 10 h 36 min at the start of May to 9 h 54 min by month's end. Set against the rest of the year, May is Castelar's 11th-clearest and 12th-windiest month. For the whole year in context, see Castelar's year-round climate.
- Daytime high
- 18°
- 9th warmest
- Overnight low
- 9°
- 5th coldest
- Rainfall
- 62 mm
- 6.2 wet days
- Daylight
- 10 h 12 min
- 7:45 AM – 5:57 PM
- Cloud cover
- 57%
- 11th clearest
- Wind
- 12 km/h
- 12th windiest
- Solar energy
- 2.65 kWh/m²
- Travel score
- 6.5
- out of 10
Castelar is city in Buenos Aires Province, Argentina.
- Density
- 5,302/km²
- people per km²
- Founded
- 1910
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in May
Highs ease over the month, from about 20°C in the first days to 17°C by the end.
A typical May day in Castelar reaches about 18°C in the afternoon and slips back to 9°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 23°C. Set against its neighbours, May runs about 4°C cooler than April and about 3°C warmer than June.
| 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) | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 16 |
| Avg low (°C) | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 20 | 11 |
| 2 | 20 | 11 |
| 3 | 20 | 11 |
| 4 | 20 | 11 |
| 5 | 20 | 10 |
| 6 | 20 | 10 |
| 7 | 20 | 10 |
| 8 | 20 | 10 |
| 9 | 20 | 10 |
| 10 | 19 | 10 |
| 11 | 19 | 10 |
| 12 | 19 | 10 |
| 13 | 19 | 10 |
| 14 | 19 | 10 |
| 15 | 19 | 10 |
| 16 | 19 | 9 |
| 17 | 18 | 9 |
| 18 | 18 | 9 |
| 19 | 18 | 9 |
| 20 | 18 | 9 |
| 21 | 18 | 9 |
| 22 | 18 | 9 |
| 23 | 17 | 9 |
| 24 | 17 | 9 |
| 25 | 17 | 8 |
| 26 | 17 | 8 |
| 27 | 17 | 8 |
| 28 | 17 | 8 |
| 29 | 17 | 8 |
| 30 | 17 | 8 |
| 31 | 16 | 8 |
Castelar weather by month
How May compares with the rest of the year at a glance. May is the 9th-warmest and 9th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 29° / 18° | 88 | 7.7 | 14.1 | 5.9 |
| Feb | 28° / 18° | 93 | 8.3 | 13.3 | 6.4 |
| Mar | 26° / 16° | 85 | 7.5 | 12.3 | 7.3 |
| Apr | 22° / 12° | 91 | 8.1 | 11.2 | 7.2 |
| May | 18° / 9° | 62 | 6.2 | 10.2 | 6.5 |
| Jun | 15° / 7° | 58 | 5.9 | 9.7 | 5.1 |
| Jul | 15° / 6° | 57 | 6 | 9.9 | 4.8 |
| Aug | 17° / 7° | 60 | 5.9 | 10.7 | 5.9 |
| Sep | 19° / 9° | 71 | 6.8 | 11.8 | 6.6 |
| Oct | 22° / 12° | 111 | 9.3 | 12.9 | 6.8 |
| Nov | 25° / 14° | 92 | 8.4 | 13.8 | 7.2 |
| Dec | 28° / 17° | 87 | 8.6 | 14.3 | 6.5 |
Cloud cover in May
The sky is clear or mostly clear about 36% of the time in May.
Beyond those clear spells, partly cloudy skies cover about 12% of May, with mostly cloudy or overcast conditions the remaining 52%. Skies tend to cloud over 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 (%) | 55 | 55 | 55 | 55 | 55 | 55 | 54 | 53 | 53 | 53 | 51 | 51 | 50 | 50 | 48 | 48 | 47 | 46 | 45 | 44 | 44 | 43 | 42 | 42 | 43 | 43 | 43 | 42 | 43 | 43 | 44 |
| Cloudier (%) | 45 | 45 | 45 | 45 | 45 | 45 | 46 | 47 | 47 | 47 | 49 | 49 | 50 | 50 | 52 | 52 | 53 | 54 | 55 | 56 | 56 | 57 | 58 | 58 | 57 | 57 | 57 | 58 | 57 | 57 | 56 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 55 | 45 |
| 2 | 55 | 45 |
| 3 | 55 | 45 |
| 4 | 55 | 45 |
| 5 | 55 | 45 |
| 6 | 55 | 45 |
| 7 | 54 | 46 |
| 8 | 53 | 47 |
| 9 | 53 | 47 |
| 10 | 53 | 47 |
| 11 | 51 | 49 |
| 12 | 51 | 49 |
| 13 | 50 | 50 |
| 14 | 50 | 50 |
| 15 | 48 | 52 |
| 16 | 48 | 52 |
| 17 | 47 | 53 |
| 18 | 46 | 54 |
| 19 | 45 | 55 |
| 20 | 44 | 56 |
| 21 | 44 | 56 |
| 22 | 43 | 57 |
| 23 | 42 | 58 |
| 24 | 42 | 58 |
| 25 | 43 | 57 |
| 26 | 43 | 57 |
| 27 | 43 | 57 |
| 28 | 42 | 58 |
| 29 | 43 | 57 |
| 30 | 43 | 57 |
| 31 | 44 | 56 |
Chance of precipitation in May
Castelar gets around 62 mm of rain over 6.2 wet days in May. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 20% and peaks near 22% 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 (%) | 22 | 22 | 21 | 21 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 21 | 21 | 21 | 20 | 20 | 19 | 19 | 19 |
| Rain chance (%) | |
|---|---|
| 1 | 22 |
| 2 | 22 |
| 3 | 21 |
| 4 | 21 |
| 5 | 20 |
| 6 | 20 |
| 7 | 19 |
| 8 | 19 |
| 9 | 19 |
| 10 | 19 |
| 11 | 19 |
| 12 | 19 |
| 13 | 19 |
| 14 | 20 |
| 15 | 20 |
| 16 | 21 |
| 17 | 21 |
| 18 | 21 |
| 19 | 21 |
| 20 | 21 |
| 21 | 22 |
| 22 | 22 |
| 23 | 22 |
| 24 | 21 |
| 25 | 21 |
| 26 | 21 |
| 27 | 20 |
| 28 | 20 |
| 29 | 19 |
| 30 | 19 |
| 31 | 19 |
Humidity in May
Most of May feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, May lands in the dry band about 74% 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 65 | 65 | 66 | 66 | 68 | 68 | 68 | 71 | 71 | 72 | 72 | 73 | 74 | 74 | 74 | 74 | 74 | 74 | 75 | 76 | 77 | 77 | 78 | 79 | 79 | 81 | 82 | 83 | 84 | 85 | 86 |
| Comfortable (%) | 21 | 21 | 20 | 20 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 15 | 15 | 14 | 13 | 13 | 12 | 11 | 11 | 10 | 10 | 9 |
| Humid (%) | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 5 | 5 | 4 | 4 |
| Muggy (%) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 65 | 21 | 12 | 2 |
| 2 | 65 | 21 | 12 | 2 |
| 3 | 66 | 20 | 12 | 2 |
| 4 | 66 | 20 | 12 | 2 |
| 5 | 68 | 19 | 11 | 2 |
| 6 | 68 | 19 | 11 | 2 |
| 7 | 68 | 19 | 11 | 2 |
| 8 | 71 | 18 | 10 | 1 |
| 9 | 71 | 18 | 10 | 1 |
| 10 | 72 | 18 | 9 | 1 |
| 11 | 72 | 18 | 9 | 1 |
| 12 | 73 | 17 | 9 | 1 |
| 13 | 74 | 17 | 8 | 1 |
| 14 | 74 | 17 | 8 | 1 |
| 15 | 74 | 17 | 8 | 1 |
| 16 | 74 | 17 | 8 | 1 |
| 17 | 74 | 17 | 8 | 1 |
| 18 | 74 | 17 | 8 | 1 |
| 19 | 75 | 16 | 8 | 1 |
| 20 | 76 | 16 | 7 | 1 |
| 21 | 77 | 15 | 7 | 1 |
| 22 | 77 | 15 | 7 | 1 |
| 23 | 78 | 14 | 7 | 1 |
| 24 | 79 | 13 | 7 | 1 |
| 25 | 79 | 13 | 7 | 1 |
| 26 | 81 | 12 | 6 | 1 |
| 27 | 82 | 11 | 6 | 1 |
| 28 | 83 | 11 | 5 | 1 |
| 29 | 84 | 10 | 5 | 1 |
| 30 | 85 | 10 | 4 | 1 |
| 31 | 86 | 9 | 4 | 1 |
Wind in May
Winds average 12 km/h in May, the calmest month.
Across May, daily wind ranges from about 12 km/h on the calmest days to 12 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) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 12 | calm |
| 2 | 12 | calm |
| 3 | 12 | calm |
| 4 | 12 | calm |
| 5 | 12 | calm |
| 6 | 12 | calm |
| 7 | 12 | calm |
| 8 | 12 | calm |
| 9 | 12 | calm |
| 10 | 12 | calm |
| 11 | 12 | calm |
| 12 | 12 | calm |
| 13 | 12 | calm |
| 14 | 12 | calm |
| 15 | 12 | calm |
| 16 | 12 | light breeze |
| 17 | 12 | light breeze |
| 18 | 12 | light breeze |
| 19 | 12 | light breeze |
| 20 | 12 | light breeze |
| 21 | 12 | light breeze |
| 22 | 12 | light breeze |
| 23 | 12 | light breeze |
| 24 | 12 | light breeze |
| 25 | 12 | light breeze |
| 26 | 12 | light breeze |
| 27 | 12 | light breeze |
| 28 | 12 | light breeze |
| 29 | 12 | light breeze |
| 30 | 12 | light breeze |
| 31 | 12 | light breeze |
Sunrise & sunset in May
Daylight runs from about 10 h 36 min at the start of May to 9 h 54 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 42 minutes over May. Sunrise moves from 7:33 AM to 7:56 AM, and sunset from 6:11 PM to 5:48 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) | 10.6 | 10.6 | 10.6 | 10.5 | 10.5 | 10.5 | 10.4 | 10.4 | 10.4 | 10.4 | 10.3 | 10.3 | 10.3 | 10.2 | 10.2 | 10.2 | 10.2 | 10.1 | 10.1 | 10.1 | 10.1 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | 9.9 | 9.9 | 9.9 | 9.9 | 9.9 |
| Sunrise (AM) | 7:33 | 7:34 | 7:35 | 7:35 | 7:36 | 7:37 | 7:38 | 7:39 | 7:39 | 7:40 | 7:41 | 7:42 | 7:43 | 7:43 | 7:44 | 7:45 | 7:46 | 7:47 | 7:47 | 7:48 | 7:49 | 7:50 | 7:50 | 7:51 | 7:52 | 7:52 | 7:53 | 7:54 | 7:55 | 7:55 | 7:56 |
| Sunset (PM) | 6:11 | 6:09 | 6:08 | 6:07 | 6:06 | 6:05 | 6:04 | 6:03 | 6:03 | 6:02 | 6:01 | 6:00 | 5:59 | 5:58 | 5:57 | 5:57 | 5:56 | 5:55 | 5:54 | 5:54 | 5:53 | 5:53 | 5:52 | 5:51 | 5:51 | 5:50 | 5:50 | 5:49 | 5:49 | 5:48 | 5:48 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 10.6 | 7:33 | 6:11 |
| 2 | 10.6 | 7:34 | 6:09 |
| 3 | 10.6 | 7:35 | 6:08 |
| 4 | 10.5 | 7:35 | 6:07 |
| 5 | 10.5 | 7:36 | 6:06 |
| 6 | 10.5 | 7:37 | 6:05 |
| 7 | 10.4 | 7:38 | 6:04 |
| 8 | 10.4 | 7:39 | 6:03 |
| 9 | 10.4 | 7:39 | 6:03 |
| 10 | 10.4 | 7:40 | 6:02 |
| 11 | 10.3 | 7:41 | 6:01 |
| 12 | 10.3 | 7:42 | 6:00 |
| 13 | 10.3 | 7:43 | 5:59 |
| 14 | 10.2 | 7:43 | 5:58 |
| 15 | 10.2 | 7:44 | 5:57 |
| 16 | 10.2 | 7:45 | 5:57 |
| 17 | 10.2 | 7:46 | 5:56 |
| 18 | 10.1 | 7:47 | 5:55 |
| 19 | 10.1 | 7:47 | 5:54 |
| 20 | 10.1 | 7:48 | 5:54 |
| 21 | 10.1 | 7:49 | 5:53 |
| 22 | 10.0 | 7:50 | 5:53 |
| 23 | 10.0 | 7:50 | 5:52 |
| 24 | 10.0 | 7:51 | 5:51 |
| 25 | 10.0 | 7:52 | 5:51 |
| 26 | 10.0 | 7:52 | 5:50 |
| 27 | 9.9 | 7:53 | 5:50 |
| 28 | 9.9 | 7:54 | 5:49 |
| 29 | 9.9 | 7:55 | 5:49 |
| 30 | 9.9 | 7:55 | 5:48 |
| 31 | 9.9 | 7:56 | 5:48 |
Solar energy in May
Average shortwave solar energy reaching the ground each day in May, about 2.65 kWh/m².
For context, solar energy here swings from a low near 2.24 kWh/m² to a high of 7.45 kWh/m² in December across the year — May's 2.65 kWh/m² sits near the bottom.
| 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) | 3.1 | 3.1 | 3.1 | 3.1 | 3.0 | 3.0 | 3.0 | 2.9 | 2.9 | 2.9 | 2.8 | 2.8 | 2.8 | 2.7 | 2.7 | 2.6 | 2.6 | 2.6 | 2.5 | 2.5 | 2.5 | 2.5 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.3 | 2.3 | 2.3 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 3.1 | Moderate |
| 2 | 3.1 | Moderate |
| 3 | 3.1 | Moderate |
| 4 | 3.1 | Moderate |
| 5 | 3.0 | Moderate |
| 6 | 3.0 | Moderate |
| 7 | 3.0 | Moderate |
| 8 | 2.9 | Moderate |
| 9 | 2.9 | Moderate |
| 10 | 2.9 | Moderate |
| 11 | 2.8 | Moderate |
| 12 | 2.8 | Moderate |
| 13 | 2.8 | Moderate |
| 14 | 2.7 | Moderate |
| 15 | 2.7 | Moderate |
| 16 | 2.6 | Moderate |
| 17 | 2.6 | Moderate |
| 18 | 2.6 | Moderate |
| 19 | 2.5 | Moderate |
| 20 | 2.5 | Moderate |
| 21 | 2.5 | Moderate |
| 22 | 2.5 | Moderate |
| 23 | 2.4 | Moderate |
| 24 | 2.4 | Moderate |
| 25 | 2.4 | Moderate |
| 26 | 2.4 | Moderate |
| 27 | 2.4 | Moderate |
| 28 | 2.4 | Moderate |
| 29 | 2.3 | Moderate |
| 30 | 2.3 | Moderate |
| 31 | 2.3 | Moderate |
Is May a good time to visit Castelar?
Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
May is a reasonable time to visit Castelar for sightseeing.
What to pack for Castelar in May
From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In May, Castelar sees daytime highs around 18°C and nights near 9°C. Little to plan around — just the basics. About 6 days see rain.
Sea temperature near Castelar in May
The nearest coast averages about 17°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 24 km away) is warmest in January at about 25°C and coldest in July near 13°C.
It's comfortable for a long swim from Nov 9 to Apr 20 — about 5.4 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 25 | 25 | 23 | 21 | 17 | 14 | 13 | 13 | 15 | 18 | 21 | 23 |
| Comfort | Warm | Warm | Refreshing | Refreshing | Cool | Bracing | Bracing | Bracing | Cool | Cool | Refreshing | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 25 | Warm |
| Feb | 25 | Warm |
| Mar | 23 | Refreshing |
| Apr | 21 | Refreshing |
| May | 17 | Cool |
| Jun | 14 | Bracing |
| Jul | 13 | Bracing |
| Aug | 13 | Bracing |
| Sep | 15 | Cool |
| Oct | 18 | Cool |
| Nov | 21 | Refreshing |
| Dec | 23 | Refreshing |
UV index in Castelar in May
Clear-sky midday UV in May peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Castelar peaks around January 13 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 13 | 11 | 9 | 6 | 3 | 3 | 3 | 4 | 6 | 8 | 11 | 12 |
| Level | Extreme | Extreme | Very high | High | Moderate | Moderate | Moderate | Moderate | High | Very high | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 11 | Extreme |
| Mar | 9 | Very high |
| Apr | 6 | High |
| May | 3 | Moderate |
| Jun | 3 | Moderate |
| Jul | 3 | Moderate |
| Aug | 4 | Moderate |
| Sep | 6 | High |
| Oct | 8 | Very high |
| Nov | 11 | Extreme |
| Dec | 12 | Extreme |
Air quality in Castelar in May
Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.
Air quality in Castelar is worst in June — around 25 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (December, 12 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) | 13 | 14 | 16 | 17 | 22 | 25 | 25 | 24 | 19 | 16 | 13 | 12 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 13 | Moderate |
| Feb | 14 | Moderate |
| Mar | 16 | Moderate |
| Apr | 17 | Moderate |
| May | 22 | Moderate |
| Jun | 25 | Moderate |
| Jul | 25 | Moderate |
| Aug | 24 | Moderate |
| Sep | 19 | Moderate |
| Oct | 16 | Moderate |
| Nov | 13 | Moderate |
| Dec | 12 | Moderate |
Where is Castelar?
Castelar sits at 34.7°S, 58.6°W, 25 m above sea level, in Argentina. The nearest listed city is Morón, 2.0 km away.
Topography around Castelar
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Castelar.
Within 3 km, the terrain around Castelar has only modest variations in elevation — a maximum elevation change of 27 m around an average of 26 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 53 m; within 80 km, only modest variations in elevation — a maximum elevation change of 105 m.
The land around Castelar is covered by artificial surfaces (84%) within 3 km, artificial surfaces (64%) and trees (20%) within 16 km, and grassland (30%) and cropland (25%) within 80 km.
Argentina travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / I
- 220 V · 50 Hz
- Prices
- ≈ 46% of US
- price level, 2025
- GDP per capita
- $14,898
- 2025
- Happiness
- 6.4 / 10
- World Happiness, 2025
- Homicide rate
- 4.5
- per 100k, 2023
- Road deaths
- 14.1
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- High
- EF EPI 575
- 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 Castelar (-34.6514°, -58.6407°, elevation 25 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. 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).