Héliopolis weather in May
In May, Héliopolis sees average daytime highs of 25°C and overnight lows near 13°C, with 53 mm of rain across 7.9 wet days and about 13.9 hours of daylight. It is the 6th-warmest and 8th-wettest month of the year here.
Highs climb over the month, from about 23°C in the first days to 27°C by the end. The sky is clear or mostly clear about 45% of the time in May, and the air most often feels dry.
Daylight stretches from about 13 h 30 min at the start of May to 14 h 18 min by month's end. Set against the rest of the year, May is Héliopolis's 5th-clearest and 7th-windiest month. For the whole year in context, see Héliopolis's year-round climate.
- Daytime high
- 25°
- 6th warmest
- Overnight low
- 13°
- 7th coldest
- Rainfall
- 53 mm
- 7.9 wet days
- Daylight
- 13 h 54 min
- 5:28 AM – 7:25 PM
- Cloud cover
- 46%
- 5th clearest
- Wind
- 7 km/h
- 7th windiest
- Solar energy
- 6.55 kWh/m²
- Travel score
- 7.3
- out of 10
Temperature in May
Highs climb over the month, from about 23°C in the first days to 27°C by the end.
A typical May day in Héliopolis reaches about 25°C in the afternoon and slips back to 13°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 31°C. Set against its neighbours, May runs about 5°C warmer than April and about 5°C cooler 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) | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 28 | 28 |
| Avg low (°C) | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 15 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 23 | 11 |
| 2 | 23 | 11 |
| 3 | 23 | 11 |
| 4 | 23 | 12 |
| 5 | 24 | 12 |
| 6 | 24 | 12 |
| 7 | 24 | 12 |
| 8 | 24 | 12 |
| 9 | 24 | 12 |
| 10 | 24 | 12 |
| 11 | 25 | 12 |
| 12 | 25 | 13 |
| 13 | 25 | 13 |
| 14 | 25 | 13 |
| 15 | 25 | 13 |
| 16 | 25 | 13 |
| 17 | 25 | 13 |
| 18 | 26 | 13 |
| 19 | 26 | 13 |
| 20 | 26 | 13 |
| 21 | 26 | 14 |
| 22 | 26 | 14 |
| 23 | 26 | 14 |
| 24 | 26 | 14 |
| 25 | 27 | 14 |
| 26 | 27 | 14 |
| 27 | 27 | 14 |
| 28 | 27 | 15 |
| 29 | 27 | 15 |
| 30 | 28 | 15 |
| 31 | 28 | 15 |
How May really feels in Héliopolis
Once humidity and wind are folded in, May 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.
May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Héliopolis weather by month
How May compares with the rest of the year at a glance. May is the 6th-warmest and 8th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 14° / 5° | 66 | 10.6 | 9.8 | 4.2 |
| Feb | 15° / 5° | 60 | 10.1 | 10.6 | 4.5 |
| Mar | 18° / 7° | 73 | 10.7 | 11.7 | 5.7 |
| Apr | 21° / 9° | 68 | 10.4 | 12.9 | 6.4 |
| May | 25° / 13° | 53 | 7.9 | 13.9 | 7.3 |
| Jun | 31° / 17° | 18 | 3.5 | 14.4 | 5.8 |
| Jul | 34° / 20° | 5 | 1.4 | 14.2 | 3.8 |
| Aug | 34° / 20° | 18 | 3.8 | 13.4 | 3.5 |
| Sep | 30° / 18° | 40 | 8 | 12.2 | 5.5 |
| Oct | 25° / 14° | 58 | 8.6 | 11.1 | 7.1 |
| Nov | 19° / 10° | 63 | 9.8 | 10.1 | 6.3 |
| Dec | 15° / 6° | 61 | 9.5 | 9.6 | 4.9 |
Cloud cover in May
The sky is clear or mostly clear about 45% of the time in May.
Beyond those clear spells, partly cloudy skies cover about 19% of May, with mostly cloudy or overcast conditions the remaining 36%. 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 (%) | 56 | 56 | 57 | 58 | 59 | 59 | 61 | 61 | 62 | 63 | 63 | 64 | 64 | 65 | 66 | 65 | 66 | 66 | 66 | 66 | 66 | 66 | 66 | 66 | 66 | 67 | 66 | 66 | 67 | 66 | 67 |
| Cloudier (%) | 44 | 44 | 43 | 42 | 41 | 41 | 39 | 39 | 38 | 37 | 37 | 36 | 36 | 35 | 34 | 35 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 33 | 34 | 34 | 33 | 34 | 33 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 56 | 44 |
| 2 | 56 | 44 |
| 3 | 57 | 43 |
| 4 | 58 | 42 |
| 5 | 59 | 41 |
| 6 | 59 | 41 |
| 7 | 61 | 39 |
| 8 | 61 | 39 |
| 9 | 62 | 38 |
| 10 | 63 | 37 |
| 11 | 63 | 37 |
| 12 | 64 | 36 |
| 13 | 64 | 36 |
| 14 | 65 | 35 |
| 15 | 66 | 34 |
| 16 | 65 | 35 |
| 17 | 66 | 34 |
| 18 | 66 | 34 |
| 19 | 66 | 34 |
| 20 | 66 | 34 |
| 21 | 66 | 34 |
| 22 | 66 | 34 |
| 23 | 66 | 34 |
| 24 | 66 | 34 |
| 25 | 66 | 34 |
| 26 | 67 | 33 |
| 27 | 66 | 34 |
| 28 | 66 | 34 |
| 29 | 67 | 33 |
| 30 | 66 | 34 |
| 31 | 67 | 33 |
Chance of precipitation in May
Héliopolis gets around 53 mm of rain over 7.9 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 25% and peaks near 34% on the wettest days. The odds ease toward the end of the month.
| 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 (%) | 34 | 34 | 33 | 32 | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 25 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 21 | 21 |
| Rain chance (%) | |
|---|---|
| 1 | 34 |
| 2 | 34 |
| 3 | 33 |
| 4 | 32 |
| 5 | 31 |
| 6 | 30 |
| 7 | 29 |
| 8 | 28 |
| 9 | 27 |
| 10 | 26 |
| 11 | 25 |
| 12 | 25 |
| 13 | 24 |
| 14 | 24 |
| 15 | 23 |
| 16 | 23 |
| 17 | 23 |
| 18 | 23 |
| 19 | 23 |
| 20 | 23 |
| 21 | 23 |
| 22 | 23 |
| 23 | 23 |
| 24 | 23 |
| 25 | 23 |
| 26 | 23 |
| 27 | 22 |
| 28 | 22 |
| 29 | 22 |
| 30 | 21 |
| 31 | 21 |
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 60% 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 (%) | 75 | 74 | 73 | 72 | 71 | 70 | 68 | 68 | 67 | 66 | 65 | 64 | 64 | 61 | 61 | 60 | 59 | 59 | 57 | 56 | 55 | 54 | 53 | 51 | 51 | 50 | 49 | 48 | 46 | 45 | 44 |
| Comfortable (%) | 22 | 23 | 23 | 24 | 24 | 25 | 26 | 26 | 27 | 28 | 28 | 29 | 29 | 30 | 30 | 30 | 31 | 31 | 32 | 33 | 33 | 34 | 34 | 35 | 35 | 35 | 36 | 36 | 36 | 37 | 37 |
| Humid (%) | 3 | 3 | 4 | 4 | 5 | 5 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 8 | 8 | 9 | 9 | 9 | 10 | 10 | 11 | 11 | 12 | 13 | 13 | 14 | 15 | 16 | 17 | 18 | 18 |
| Muggy (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 75 | 22 | 3 | 0 |
| 2 | 74 | 23 | 3 | 0 |
| 3 | 73 | 23 | 4 | 0 |
| 4 | 72 | 24 | 4 | 0 |
| 5 | 71 | 24 | 5 | 0 |
| 6 | 70 | 25 | 5 | 0 |
| 7 | 68 | 26 | 6 | 0 |
| 8 | 68 | 26 | 6 | 0 |
| 9 | 67 | 27 | 6 | 0 |
| 10 | 66 | 28 | 6 | 0 |
| 11 | 65 | 28 | 7 | 0 |
| 12 | 64 | 29 | 7 | 0 |
| 13 | 64 | 29 | 7 | 0 |
| 14 | 61 | 30 | 8 | 1 |
| 15 | 61 | 30 | 8 | 1 |
| 16 | 60 | 30 | 9 | 1 |
| 17 | 59 | 31 | 9 | 1 |
| 18 | 59 | 31 | 9 | 1 |
| 19 | 57 | 32 | 10 | 1 |
| 20 | 56 | 33 | 10 | 1 |
| 21 | 55 | 33 | 11 | 1 |
| 22 | 54 | 34 | 11 | 1 |
| 23 | 53 | 34 | 12 | 1 |
| 24 | 51 | 35 | 13 | 1 |
| 25 | 51 | 35 | 13 | 1 |
| 26 | 50 | 35 | 14 | 1 |
| 27 | 49 | 36 | 15 | 1 |
| 28 | 48 | 36 | 16 | 1 |
| 29 | 46 | 36 | 17 | 1 |
| 30 | 45 | 37 | 18 | 1 |
| 31 | 44 | 37 | 18 | 1 |
Wind in May
Winds average 7 km/h in May.
Across May, daily wind ranges from about 7 km/h on the calmest days to 7 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) | 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 | 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 | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 7 | calm |
| 2 | 7 | calm |
| 3 | 7 | 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 |
| 31 | 7 | calm |
Sunrise & sunset in May
Daylight runs from about 13 h 30 min at the start of May to 14 h 18 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 48 minutes over May. Sunrise moves from 5:43 AM to 5:19 AM, and sunset from 7:12 PM to 7:36 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) | 13.5 | 13.5 | 13.5 | 13.6 | 13.6 | 13.6 | 13.7 | 13.7 | 13.7 | 13.8 | 13.8 | 13.8 | 13.9 | 13.9 | 13.9 | 13.9 | 14.0 | 14.0 | 14.0 | 14.0 | 14.1 | 14.1 | 14.1 | 14.1 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.3 | 14.3 |
| Sunrise (AM) | 5:43 | 5:42 | 5:41 | 5:40 | 5:39 | 5:38 | 5:37 | 5:36 | 5:35 | 5:34 | 5:33 | 5:32 | 5:31 | 5:30 | 5:29 | 5:28 | 5:28 | 5:27 | 5:26 | 5:25 | 5:25 | 5:24 | 5:23 | 5:23 | 5:22 | 5:21 | 5:21 | 5:20 | 5:20 | 5:20 | 5:19 |
| Sunset (PM) | 7:12 | 7:12 | 7:13 | 7:14 | 7:15 | 7:16 | 7:17 | 7:18 | 7:19 | 7:19 | 7:20 | 7:21 | 7:22 | 7:23 | 7:24 | 7:25 | 7:25 | 7:26 | 7:27 | 7:28 | 7:29 | 7:29 | 7:30 | 7:31 | 7:32 | 7:33 | 7:33 | 7:34 | 7:35 | 7:35 | 7:36 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.5 | 5:43 | 7:12 |
| 2 | 13.5 | 5:42 | 7:12 |
| 3 | 13.5 | 5:41 | 7:13 |
| 4 | 13.6 | 5:40 | 7:14 |
| 5 | 13.6 | 5:39 | 7:15 |
| 6 | 13.6 | 5:38 | 7:16 |
| 7 | 13.7 | 5:37 | 7:17 |
| 8 | 13.7 | 5:36 | 7:18 |
| 9 | 13.7 | 5:35 | 7:19 |
| 10 | 13.8 | 5:34 | 7:19 |
| 11 | 13.8 | 5:33 | 7:20 |
| 12 | 13.8 | 5:32 | 7:21 |
| 13 | 13.9 | 5:31 | 7:22 |
| 14 | 13.9 | 5:30 | 7:23 |
| 15 | 13.9 | 5:29 | 7:24 |
| 16 | 13.9 | 5:28 | 7:25 |
| 17 | 14.0 | 5:28 | 7:25 |
| 18 | 14.0 | 5:27 | 7:26 |
| 19 | 14.0 | 5:26 | 7:27 |
| 20 | 14.0 | 5:25 | 7:28 |
| 21 | 14.1 | 5:25 | 7:29 |
| 22 | 14.1 | 5:24 | 7:29 |
| 23 | 14.1 | 5:23 | 7:30 |
| 24 | 14.1 | 5:23 | 7:31 |
| 25 | 14.2 | 5:22 | 7:32 |
| 26 | 14.2 | 5:21 | 7:33 |
| 27 | 14.2 | 5:21 | 7:33 |
| 28 | 14.2 | 5:20 | 7:34 |
| 29 | 14.2 | 5:20 | 7:35 |
| 30 | 14.3 | 5:20 | 7:35 |
| 31 | 14.3 | 5:19 | 7:36 |
Solar energy in May
Average shortwave solar energy reaching the ground each day in May, about 6.55 kWh/m².
For context, solar energy here swings from a low near 2.22 kWh/m² to a high of 7.46 kWh/m² in July across the year — May's 6.55 kWh/m² sits near the top of that range.
| 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) | 6.2 | 6.2 | 6.2 | 6.3 | 6.3 | 6.3 | 6.4 | 6.4 | 6.4 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.8 | 6.8 | 6.8 |
| 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 | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.2 | Intense |
| 2 | 6.2 | Intense |
| 3 | 6.2 | Intense |
| 4 | 6.3 | Intense |
| 5 | 6.3 | Intense |
| 6 | 6.3 | Intense |
| 7 | 6.4 | Intense |
| 8 | 6.4 | Intense |
| 9 | 6.4 | Intense |
| 10 | 6.5 | Intense |
| 11 | 6.5 | Intense |
| 12 | 6.5 | Intense |
| 13 | 6.5 | Intense |
| 14 | 6.5 | Intense |
| 15 | 6.5 | Intense |
| 16 | 6.6 | Intense |
| 17 | 6.6 | Intense |
| 18 | 6.6 | Intense |
| 19 | 6.6 | Intense |
| 20 | 6.6 | Intense |
| 21 | 6.6 | Intense |
| 22 | 6.6 | Intense |
| 23 | 6.6 | Intense |
| 24 | 6.7 | Intense |
| 25 | 6.7 | Intense |
| 26 | 6.7 | Intense |
| 27 | 6.7 | Intense |
| 28 | 6.7 | Intense |
| 29 | 6.8 | Intense |
| 30 | 6.8 | Intense |
| 31 | 6.8 | Intense |
Hazard calendar for Héliopolis
None of Héliopolis's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Héliopolis sees seasonal dust haze (June), heaviest in June.
Is May a good time to visit Héliopolis?
Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
May is one of the better times to visit Héliopolis for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Héliopolis in May
From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In May, Héliopolis sees daytime highs around 25°C and nights near 13°C. Pack sun protection. Worth having: light clothes. About 8 days see rain.
Sea temperature near Héliopolis in May
The nearest coast averages about 18°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 56 km away) is warmest in August at about 26°C and coldest in February near 15°C.
It's comfortable for a long swim from May 31 to Nov 17 — about 5.6 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 16 | 15 | 15 | 16 | 18 | 22 | 25 | 26 | 25 | 23 | 20 | 17 |
| Comfort | Cool | Bracing | Cool | Cool | Cool | Refreshing | Warm | Warm | Warm | Refreshing | Refreshing | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 16 | Cool |
| Feb | 15 | Bracing |
| Mar | 15 | Cool |
| Apr | 16 | Cool |
| May | 18 | Cool |
| Jun | 22 | Refreshing |
| Jul | 25 | Warm |
| Aug | 26 | Warm |
| Sep | 25 | Warm |
| Oct | 23 | Refreshing |
| Nov | 20 | Refreshing |
| Dec | 17 | Cool |
UV index in Héliopolis in May
Clear-sky midday UV in May peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Héliopolis peaks around July 15 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 2 (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) | 2 | 4 | 6 | 6 | 7 | 8 | 10 | 8 | 7 | 5 | 3 | 2 |
| Level | Moderate | Moderate | High | High | Very high | Very high | Very high | Very high | Very high | High | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 4 | Moderate |
| Mar | 6 | High |
| Apr | 6 | High |
| May | 7 | Very high |
| Jun | 8 | Very high |
| Jul | 10 | Very high |
| Aug | 8 | Very high |
| Sep | 7 | Very high |
| Oct | 5 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Low |
Air quality in Héliopolis 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 Héliopolis is worst in August — around 47 µg/m³ PM2.5 (poor), about 2.0× the cleanest month (May, 24 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) | 27 | 29 | 29 | 30 | 24 | 25 | 31 | 47 | 27 | 27 | 26 | 29 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Poor | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 27 | Moderate |
| Feb | 29 | Moderate |
| Mar | 29 | Moderate |
| Apr | 30 | Moderate |
| May | 24 | Moderate |
| Jun | 25 | Moderate |
| Jul | 31 | Moderate |
| Aug | 47 | Poor |
| Sep | 27 | Moderate |
| Oct | 27 | Moderate |
| Nov | 26 | Moderate |
| Dec | 29 | Moderate |
Where is Héliopolis?
Héliopolis sits at 36.5°N, 7.4°E, 268 m above sea level, in Algeria. The nearest listed city is Guelma, 5.0 km away.
Topography around Héliopolis
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Héliopolis.
Within 3 km, the terrain around Héliopolis has significant variations in elevation — a maximum elevation change of 331 m around an average of 270 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,293 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,593 m.
The land around Héliopolis is covered by cropland (55%) and grassland (20%) within 3 km, cropland (36%), grassland (28%) and trees (25%) within 16 km, and cropland (36%), grassland (24%) and trees (21%) within 80 km.
Algeria travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 33% of US
- price level, 2025
- GDP per capita
- $6,051
- 2025
- Happiness
- 5.7 / 10
- World Happiness, 2025
- Safe drinking water
- 69%
- of population, 2024
- Homicide rate
- 1.2
- per 100k, 2023
- Road deaths
- 20.9
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 468
- 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 Héliopolis (36.5036°, 7.4428°, elevation 268 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).