Casa de Oro-Mount Helix weather in July
In July, Casa de Oro-Mount Helix sees average daytime highs of 79°F and overnight lows near 64°F, with 0.1 in of rain across 0.7 wet days and about 13.9 hours of daylight. It is the 3rd-warmest and 10th-wettest month of the year here.
Day-to-day highs hold fairly steady near 79°F through the month. The sky is clear or mostly clear about 83% of the time in July, and the air most often feels comfortable.
Daylight stretches from about 14 h 06 min at the start of July to 13 h 42 min by month's end. Set against the rest of the year, July is Casa de Oro-Mount Helix's 3rd-clearest and 9th-windiest month. For the whole year in context, see Casa de Oro-Mount Helix's year-round climate.
- Daytime high
- 79°
- 3rd warmest
- Overnight low
- 64°
- 11th coldest
- Rainfall
- 0.1 in
- 0.7 wet days
- Daylight
- 14 hours
- 4:55 AM – 6:52 PM
- Cloud cover
- 20%
- 3rd clearest
- Wind
- 5 mph
- 9th windiest
- Solar energy
- 7.79 kWh/m²
- Travel score
- 8.9
- out of 10
Casa de Oro-Mount Helix is census designated place in San Diego County, California, United States.
- Density
- 1,058/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in July
Day-to-day highs hold fairly steady near 79°F through the month.
A typical July day in Casa de Oro-Mount Helix reaches about 79°F in the afternoon and slips back to 64°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 74°F and 85°F. Set against its neighbours, July runs about 5°F warmer than June and about 2°F cooler than August.
| 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 (°F) | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 79 | 79 | 79 | 79 | 79 | 79 | 79 | 79 | 79 | 79 | 79 | 79 | 79 | 79 | 79 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 |
| Avg low (°F) | 62 | 62 | 62 | 63 | 63 | 63 | 63 | 63 | 63 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 65 | 65 | 65 | 65 | 65 | 65 | 65 | 65 | 65 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 78 | 62 |
| 2 | 78 | 62 |
| 3 | 78 | 62 |
| 4 | 78 | 63 |
| 5 | 78 | 63 |
| 6 | 78 | 63 |
| 7 | 78 | 63 |
| 8 | 79 | 63 |
| 9 | 79 | 63 |
| 10 | 79 | 64 |
| 11 | 79 | 64 |
| 12 | 79 | 64 |
| 13 | 79 | 64 |
| 14 | 79 | 64 |
| 15 | 79 | 64 |
| 16 | 79 | 64 |
| 17 | 79 | 64 |
| 18 | 79 | 64 |
| 19 | 79 | 64 |
| 20 | 79 | 64 |
| 21 | 79 | 64 |
| 22 | 79 | 64 |
| 23 | 80 | 65 |
| 24 | 80 | 65 |
| 25 | 80 | 65 |
| 26 | 80 | 65 |
| 27 | 80 | 65 |
| 28 | 80 | 65 |
| 29 | 80 | 65 |
| 30 | 80 | 65 |
| 31 | 80 | 65 |
Casa de Oro-Mount Helix weather by month
How July compares with the rest of the year at a glance. July is the 3rd-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 | 64° / 48° | 2.3 | 5.6 | 10.1 | 6.8 |
| Feb | 64° / 48° | 2.9 | 7 | 10.8 | 6.3 |
| Mar | 65° / 50° | 1.9 | 5.8 | 11.8 | 6.8 |
| Apr | 68° / 53° | 0.9 | 3.9 | 12.8 | 7.6 |
| May | 70° / 56° | 0.4 | 2 | 13.7 | 8.2 |
| Jun | 74° / 60° | 0.1 | 0.6 | 14.1 | 9.2 |
| Jul | 79° / 64° | 0.1 | 0.7 | 13.9 | 8.9 |
| Aug | 81° / 65° | 0.1 | 0.5 | 13.2 | 8.7 |
| Sep | 80° / 64° | 0.2 | 0.9 | 12.2 | 8.8 |
| Oct | 76° / 59° | 0.6 | 2.5 | 11.2 | 8.7 |
| Nov | 70° / 53° | 0.9 | 3.3 | 10.3 | 7.9 |
| Dec | 64° / 48° | 1.9 | 5.2 | 9.9 | 6.8 |
Cloud cover in July
The sky is clear or mostly clear about 83% of the time in July.
Beyond those clear spells, partly cloudy skies cover about 9% of July, with mostly cloudy or overcast conditions the remaining 8%.
| 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 (%) | 93 | 93 | 93 | 93 | 93 | 93 | 92 | 92 | 92 | 92 | 92 | 92 | 92 | 92 | 91 | 91 | 91 | 91 | 91 | 91 | 91 | 91 | 90 | 90 | 90 | 90 | 91 | 91 | 91 | 91 | 92 |
| Cloudier (%) | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 8 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 93 | 7 |
| 2 | 93 | 7 |
| 3 | 93 | 7 |
| 4 | 93 | 7 |
| 5 | 93 | 7 |
| 6 | 93 | 7 |
| 7 | 92 | 8 |
| 8 | 92 | 8 |
| 9 | 92 | 8 |
| 10 | 92 | 8 |
| 11 | 92 | 8 |
| 12 | 92 | 8 |
| 13 | 92 | 8 |
| 14 | 92 | 8 |
| 15 | 91 | 9 |
| 16 | 91 | 9 |
| 17 | 91 | 9 |
| 18 | 91 | 9 |
| 19 | 91 | 9 |
| 20 | 91 | 9 |
| 21 | 91 | 9 |
| 22 | 91 | 9 |
| 23 | 90 | 10 |
| 24 | 90 | 10 |
| 25 | 90 | 10 |
| 26 | 90 | 10 |
| 27 | 91 | 9 |
| 28 | 91 | 9 |
| 29 | 91 | 9 |
| 30 | 91 | 9 |
| 31 | 92 | 8 |
Chance of precipitation in July
Casa de Oro-Mount Helix gets around 0.1 in of rain over 0.7 wet days in July. 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 3% 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 (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Rain chance (%) | |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 2 |
| 11 | 2 |
| 12 | 2 |
| 13 | 2 |
| 14 | 2 |
| 15 | 2 |
| 16 | 2 |
| 17 | 2 |
| 18 | 2 |
| 19 | 2 |
| 20 | 2 |
| 21 | 2 |
| 22 | 3 |
| 23 | 3 |
| 24 | 3 |
| 25 | 3 |
| 26 | 3 |
| 27 | 3 |
| 28 | 3 |
| 29 | 3 |
| 30 | 3 |
| 31 | 3 |
Humidity in July
Most of July feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, July lands in the comfortable band about 53% of days. Sticky, muggy-or-worse air turns up on roughly 6% 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 (%) | 20 | 18 | 16 | 14 | 13 | 12 | 10 | 9 | 8 | 7 | 7 | 6 | 5 | 5 | 4 | 4 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Comfortable (%) | 59 | 59 | 60 | 59 | 59 | 59 | 59 | 59 | 59 | 59 | 58 | 58 | 57 | 56 | 56 | 55 | 55 | 54 | 52 | 51 | 51 | 50 | 49 | 47 | 46 | 45 | 44 | 43 | 42 | 42 | 41 |
| Humid (%) | 19 | 20 | 21 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 47 | 48 | 49 |
| Muggy (%) | 2 | 3 | 3 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 20 | 59 | 19 | 2 |
| 2 | 18 | 59 | 20 | 3 |
| 3 | 16 | 60 | 21 | 3 |
| 4 | 14 | 59 | 23 | 4 |
| 5 | 13 | 59 | 24 | 4 |
| 6 | 12 | 59 | 25 | 4 |
| 7 | 10 | 59 | 26 | 5 |
| 8 | 9 | 59 | 27 | 5 |
| 9 | 8 | 59 | 28 | 5 |
| 10 | 7 | 59 | 29 | 5 |
| 11 | 7 | 58 | 30 | 5 |
| 12 | 6 | 58 | 31 | 5 |
| 13 | 5 | 57 | 32 | 6 |
| 14 | 5 | 56 | 33 | 6 |
| 15 | 4 | 56 | 34 | 6 |
| 16 | 4 | 55 | 35 | 6 |
| 17 | 3 | 55 | 36 | 6 |
| 18 | 3 | 54 | 37 | 6 |
| 19 | 3 | 52 | 38 | 7 |
| 20 | 3 | 51 | 39 | 7 |
| 21 | 2 | 51 | 40 | 7 |
| 22 | 2 | 50 | 41 | 7 |
| 23 | 2 | 49 | 42 | 7 |
| 24 | 2 | 47 | 43 | 8 |
| 25 | 2 | 46 | 44 | 8 |
| 26 | 2 | 45 | 45 | 8 |
| 27 | 2 | 44 | 46 | 9 |
| 28 | 2 | 43 | 47 | 9 |
| 29 | 2 | 42 | 47 | 9 |
| 30 | 2 | 42 | 48 | 9 |
| 31 | 2 | 41 | 49 | 9 |
Wind in July
Winds average 5 mph in July.
Across July, daily wind ranges from about 5 mph on the calmest days to 5 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| 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 (mph) | Feels | |
|---|---|---|
| 1 | 5 | calm |
| 2 | 5 | calm |
| 3 | 5 | calm |
| 4 | 5 | calm |
| 5 | 5 | calm |
| 6 | 5 | calm |
| 7 | 5 | calm |
| 8 | 5 | calm |
| 9 | 5 | calm |
| 10 | 5 | calm |
| 11 | 5 | calm |
| 12 | 5 | calm |
| 13 | 5 | calm |
| 14 | 5 | calm |
| 15 | 5 | calm |
| 16 | 5 | calm |
| 17 | 5 | calm |
| 18 | 5 | calm |
| 19 | 5 | calm |
| 20 | 5 | calm |
| 21 | 5 | calm |
| 22 | 5 | calm |
| 23 | 5 | calm |
| 24 | 5 | calm |
| 25 | 5 | calm |
| 26 | 5 | calm |
| 27 | 5 | calm |
| 28 | 5 | calm |
| 29 | 5 | calm |
| 30 | 5 | calm |
| 31 | 5 | calm |
Sunrise & sunset in July
Daylight runs from about 14 h 06 min at the start of July to 13 h 42 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 24 minutes over July. Sunrise moves from 4:47 AM to 5:04 AM, and sunset from 6:55 PM to 6:44 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) | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.0 | 14.0 | 14.0 | 14.0 | 14.0 | 14.0 | 14.0 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.8 | 13.8 | 13.8 | 13.8 | 13.7 | 13.7 | 13.7 | 13.7 | 13.7 |
| Sunrise (AM) | 4:47 | 4:48 | 4:48 | 4:48 | 4:49 | 4:49 | 4:50 | 4:50 | 4:51 | 4:51 | 4:52 | 4:52 | 4:53 | 4:53 | 4:54 | 4:55 | 4:55 | 4:56 | 4:56 | 4:57 | 4:58 | 4:58 | 4:59 | 5:00 | 5:00 | 5:01 | 5:02 | 5:02 | 5:03 | 5:04 | 5:04 |
| Sunset (PM) | 6:55 | 6:55 | 6:55 | 6:55 | 6:55 | 6:55 | 6:55 | 6:55 | 6:54 | 6:54 | 6:54 | 6:54 | 6:53 | 6:53 | 6:53 | 6:52 | 6:52 | 6:52 | 6:51 | 6:51 | 6:50 | 6:50 | 6:49 | 6:48 | 6:48 | 6:47 | 6:47 | 6:46 | 6:45 | 6:44 | 6:44 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 14.1 | 4:47 | 6:55 |
| 2 | 14.1 | 4:48 | 6:55 |
| 3 | 14.1 | 4:48 | 6:55 |
| 4 | 14.1 | 4:48 | 6:55 |
| 5 | 14.1 | 4:49 | 6:55 |
| 6 | 14.1 | 4:49 | 6:55 |
| 7 | 14.1 | 4:50 | 6:55 |
| 8 | 14.1 | 4:50 | 6:55 |
| 9 | 14.1 | 4:51 | 6:54 |
| 10 | 14.0 | 4:51 | 6:54 |
| 11 | 14.0 | 4:52 | 6:54 |
| 12 | 14.0 | 4:52 | 6:54 |
| 13 | 14.0 | 4:53 | 6:53 |
| 14 | 14.0 | 4:53 | 6:53 |
| 15 | 14.0 | 4:54 | 6:53 |
| 16 | 14.0 | 4:55 | 6:52 |
| 17 | 13.9 | 4:55 | 6:52 |
| 18 | 13.9 | 4:56 | 6:52 |
| 19 | 13.9 | 4:56 | 6:51 |
| 20 | 13.9 | 4:57 | 6:51 |
| 21 | 13.9 | 4:58 | 6:50 |
| 22 | 13.9 | 4:58 | 6:50 |
| 23 | 13.8 | 4:59 | 6:49 |
| 24 | 13.8 | 5:00 | 6:48 |
| 25 | 13.8 | 5:00 | 6:48 |
| 26 | 13.8 | 5:01 | 6:47 |
| 27 | 13.7 | 5:02 | 6:47 |
| 28 | 13.7 | 5:02 | 6:46 |
| 29 | 13.7 | 5:03 | 6:45 |
| 30 | 13.7 | 5:04 | 6:44 |
| 31 | 13.7 | 5:04 | 6:44 |
Solar energy in July
Average shortwave solar energy reaching the ground each day in July, about 7.79 kWh/m².
For context, solar energy here swings from a low near 3.14 kWh/m² to a high of 8.08 kWh/m² in June across the year — July's 7.79 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) | 8.1 | 8.1 | 8.1 | 8.0 | 8.0 | 8.0 | 8.0 | 8.0 | 7.9 | 7.9 | 7.9 | 7.9 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.6 | 7.6 | 7.6 | 7.6 | 7.6 | 7.6 | 7.6 |
| 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 | 8.1 | Intense |
| 2 | 8.1 | Intense |
| 3 | 8.1 | Intense |
| 4 | 8.0 | Intense |
| 5 | 8.0 | Intense |
| 6 | 8.0 | Intense |
| 7 | 8.0 | Intense |
| 8 | 8.0 | Intense |
| 9 | 7.9 | Intense |
| 10 | 7.9 | Intense |
| 11 | 7.9 | Intense |
| 12 | 7.9 | Intense |
| 13 | 7.8 | Intense |
| 14 | 7.8 | Intense |
| 15 | 7.8 | Intense |
| 16 | 7.8 | Intense |
| 17 | 7.8 | Intense |
| 18 | 7.8 | Intense |
| 19 | 7.7 | Intense |
| 20 | 7.7 | Intense |
| 21 | 7.7 | Intense |
| 22 | 7.7 | Intense |
| 23 | 7.7 | Intense |
| 24 | 7.7 | Intense |
| 25 | 7.6 | Intense |
| 26 | 7.6 | Intense |
| 27 | 7.6 | Intense |
| 28 | 7.6 | Intense |
| 29 | 7.6 | Intense |
| 30 | 7.6 | Intense |
| 31 | 7.6 | Intense |
Is July a good time to visit Casa de Oro-Mount Helix?
Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
July is one of the better times to visit Casa de Oro-Mount Helix for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Casa de Oro-Mount Helix in July
From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In July, Casa de Oro-Mount Helix sees daytime highs around 79°F and nights near 64°F. Pack sun protection. Worth having: light clothes.
Sea temperature near Casa de Oro-Mount Helix in July
The nearest coast averages about 68°F in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 13 mi away) is warmest in August at about 70°F and coldest in February near 59°F.
It's comfortable for a long swim from Jul 13 to Sep 28 — about 2.6 months when the water holds above 68°F.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 60 | 59 | 60 | 61 | 63 | 65 | 68 | 70 | 69 | 67 | 64 | 61 |
| Comfort | Cool | Cool | Cool | Cool | Cool | Cool | Refreshing | Refreshing | Refreshing | Cool | Cool | Cool |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 60 | Cool |
| Feb | 59 | Cool |
| Mar | 60 | Cool |
| Apr | 61 | Cool |
| May | 63 | Cool |
| Jun | 65 | Cool |
| Jul | 68 | Refreshing |
| Aug | 70 | Refreshing |
| Sep | 69 | Refreshing |
| Oct | 67 | Cool |
| Nov | 64 | Cool |
| Dec | 61 | Cool |
UV index in Casa de Oro-Mount Helix in July
Clear-sky midday UV in July peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Casa de Oro-Mount Helix peaks around June 22 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 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 | 11 | 9 | 6 | 4 | 3 |
| Level | Moderate | Moderate | High | Very high | Very high | Extreme | Extreme | Extreme | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 4 | Moderate |
| Feb | 5 | Moderate |
| Mar | 5 | High |
| Apr | 8 | Very high |
| May | 8 | Very high |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 11 | Extreme |
| Sep | 9 | Very high |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 3 | Moderate |
Air quality in Casa de Oro-Mount Helix in July
Average fine-particle pollution (PM2.5) through the year — so you can see where July falls, not just the annual average.
Air quality in Casa de Oro-Mount Helix is worst in September — around 26 µg/m³ PM2.5 (moderate), about 3.4× the cleanest month (May, 8 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) | 12 | 12 | 12 | 11 | 8 | 11 | 11 | 15 | 26 | 14 | 12 | 16 |
| Level | Good | Moderate | Moderate | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 12 | Good |
| Feb | 12 | Moderate |
| Mar | 12 | Moderate |
| Apr | 11 | Good |
| May | 8 | Good |
| Jun | 11 | Good |
| Jul | 11 | Good |
| Aug | 15 | Moderate |
| Sep | 26 | Moderate |
| Oct | 14 | Moderate |
| Nov | 12 | Moderate |
| Dec | 16 | Moderate |
Where is Casa de Oro-Mount Helix?
Casa de Oro-Mount Helix sits at 32.8°N, 117.0°W, 840 ft above sea level, in United States. The nearest listed city is El Cajon, 1.9 mi away.
Topography around Casa de Oro-Mount Helix
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Casa de Oro-Mount Helix.
Within 2 miles, the terrain around Casa de Oro-Mount Helix has significant variations in elevation — a maximum elevation change of 932 ft around an average of 643 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,762 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 6,430 ft.
The land around Casa de Oro-Mount Helix is covered by artificial surfaces (59%) and trees (31%) within 2 miles, artificial surfaces (40%) and shrubs (26%) within 10 miles, and shrubs (27%) and water (27%) 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 Casa de Oro-Mount Helix (32.764°, -116.9688°, elevation 840 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. 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).