San_Ramon_ weather in December
In December, San_Ramon_ sees average daytime highs of 27°C and overnight lows near 20°C, with 75 mm of rain across 16.3 wet days and about 11.4 hours of daylight. It is the 6th-warmest and 9th-wettest month of the year here.
Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 40% of the time in December, and the air most often feels muggy.
Daylight stretches from about 11 h 30 min at the start of December to 11 h 24 min by month's end. Set against the rest of the year, December is San_Ramon_'s 4th-clearest and 4th-windiest month. For the whole year in context, see San_Ramon_'s year-round climate.
- Daytime high
- 27°
- 6th warmest
- Overnight low
- 20°
- 2nd coldest
- Rainfall
- 75 mm
- 16.3 wet days
- Daylight
- 11 h 24 min
- 5:52 AM – 5:16 PM
- Cloud cover
- 51%
- 4th clearest
- Wind
- 5 km/h
- 4th windiest
- Solar energy
- 4.45 kWh/m²
- Travel score
- 5.7
- out of 10
Temperature in December
Day-to-day highs hold fairly steady near 27°C through the month.
A typical December day in San_Ramon_ reaches about 27°C in the afternoon and slips back to 20°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 29°C. Set against its neighbours, December runs on par with November and about 1°C cooler than 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) | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 |
| Avg low (°C) | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 27 | 20 |
| 2 | 27 | 20 |
| 3 | 27 | 20 |
| 4 | 27 | 20 |
| 5 | 27 | 20 |
| 6 | 27 | 20 |
| 7 | 27 | 20 |
| 8 | 27 | 20 |
| 9 | 27 | 20 |
| 10 | 27 | 20 |
| 11 | 27 | 20 |
| 12 | 27 | 20 |
| 13 | 27 | 20 |
| 14 | 27 | 20 |
| 15 | 27 | 20 |
| 16 | 27 | 20 |
| 17 | 27 | 20 |
| 18 | 27 | 20 |
| 19 | 27 | 20 |
| 20 | 27 | 20 |
| 21 | 27 | 20 |
| 22 | 27 | 20 |
| 23 | 27 | 20 |
| 24 | 27 | 20 |
| 25 | 27 | 20 |
| 26 | 27 | 20 |
| 27 | 28 | 20 |
| 28 | 28 | 20 |
| 29 | 28 | 20 |
| 30 | 28 | 20 |
| 31 | 28 | 20 |
San_Ramon_ weather by month
How December compares with the rest of the year at a glance. December is the 6th-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 | 28° / 20° | 21 | 6.7 | 11.5 | 6.8 |
| Feb | 29° / 20° | 15 | 4.2 | 11.7 | 6.4 |
| Mar | 30° / 20° | 24 | 7.9 | 11.9 | 5.6 |
| Apr | 29° / 21° | 98 | 20.7 | 12.2 | 4.1 |
| May | 28° / 21° | 381 | 29.6 | 12.5 | 3.3 |
| Jun | 27° / 21° | 417 | 29.8 | 12.6 | 3.3 |
| Jul | 27° / 21° | 320 | 29.9 | 12.5 | 3.3 |
| Aug | 27° / 21° | 398 | 30.4 | 12.3 | 3.3 |
| Sep | 27° / 20° | 442 | 29.8 | 12.1 | 3.3 |
| Oct | 26° / 20° | 503 | 30.7 | 11.8 | 3.3 |
| Nov | 26° / 20° | 267 | 26.5 | 11.5 | 3.9 |
| Dec | 27° / 20° | 75 | 16.3 | 11.4 | 5.7 |
Cloud cover in December
The sky is clear or mostly clear about 40% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 22% of December, with mostly cloudy or overcast conditions the remaining 38%. 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 (%) | 44 | 47 | 48 | 49 | 50 | 52 | 53 | 53 | 54 | 55 | 55 | 57 | 58 | 59 | 60 | 62 | 63 | 65 | 66 | 68 | 70 | 71 | 73 | 73 | 74 | 75 | 75 | 75 | 77 | 77 | 77 |
| Cloudier (%) | 56 | 53 | 52 | 51 | 50 | 48 | 47 | 47 | 46 | 45 | 45 | 43 | 42 | 41 | 40 | 38 | 37 | 35 | 34 | 32 | 30 | 29 | 27 | 27 | 26 | 25 | 25 | 25 | 23 | 23 | 23 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 44 | 56 |
| 2 | 47 | 53 |
| 3 | 48 | 52 |
| 4 | 49 | 51 |
| 5 | 50 | 50 |
| 6 | 52 | 48 |
| 7 | 53 | 47 |
| 8 | 53 | 47 |
| 9 | 54 | 46 |
| 10 | 55 | 45 |
| 11 | 55 | 45 |
| 12 | 57 | 43 |
| 13 | 58 | 42 |
| 14 | 59 | 41 |
| 15 | 60 | 40 |
| 16 | 62 | 38 |
| 17 | 63 | 37 |
| 18 | 65 | 35 |
| 19 | 66 | 34 |
| 20 | 68 | 32 |
| 21 | 70 | 30 |
| 22 | 71 | 29 |
| 23 | 73 | 27 |
| 24 | 73 | 27 |
| 25 | 74 | 26 |
| 26 | 75 | 25 |
| 27 | 75 | 25 |
| 28 | 75 | 25 |
| 29 | 77 | 23 |
| 30 | 77 | 23 |
| 31 | 77 | 23 |
Chance of precipitation in December
San_Ramon_ gets around 75 mm of rain over 16.3 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 53% and peaks near 69% 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 (%) | 69 | 68 | 67 | 66 | 65 | 64 | 63 | 62 | 61 | 60 | 59 | 58 | 57 | 56 | 55 | 54 | 52 | 51 | 49 | 48 | 47 | 45 | 44 | 43 | 41 | 40 | 39 | 38 | 37 | 36 | 35 |
| Rain chance (%) | |
|---|---|
| 1 | 69 |
| 2 | 68 |
| 3 | 67 |
| 4 | 66 |
| 5 | 65 |
| 6 | 64 |
| 7 | 63 |
| 8 | 62 |
| 9 | 61 |
| 10 | 60 |
| 11 | 59 |
| 12 | 58 |
| 13 | 57 |
| 14 | 56 |
| 15 | 55 |
| 16 | 54 |
| 17 | 52 |
| 18 | 51 |
| 19 | 49 |
| 20 | 48 |
| 21 | 47 |
| 22 | 45 |
| 23 | 44 |
| 24 | 43 |
| 25 | 41 |
| 26 | 40 |
| 27 | 39 |
| 28 | 38 |
| 29 | 37 |
| 30 | 36 |
| 31 | 35 |
Humidity in December
Most of December feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, December lands in the muggy band about 65% of days. Sticky, muggy-or-worse air turns up on roughly 66% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Comfortable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 |
| Humid (%) | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 26 | 27 | 29 | 30 | 32 | 33 | 35 | 36 | 38 | 39 | 41 | 42 | 44 | 46 | 47 | 49 | 51 | 53 | 55 | 57 |
| Muggy (%) | 81 | 80 | 80 | 79 | 79 | 78 | 77 | 76 | 75 | 75 | 74 | 72 | 71 | 69 | 69 | 67 | 66 | 64 | 63 | 61 | 60 | 58 | 57 | 55 | 53 | 51 | 49 | 47 | 45 | 43 | 41 |
| Oppressive (%) | 5 | 5 | 4 | 4 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|
| 1 | 0 | 14 | 81 | 5 |
| 2 | 0 | 15 | 80 | 5 |
| 3 | 0 | 16 | 80 | 4 |
| 4 | 0 | 17 | 79 | 4 |
| 5 | 0 | 18 | 79 | 3 |
| 6 | 0 | 19 | 78 | 3 |
| 7 | 1 | 20 | 77 | 2 |
| 8 | 1 | 21 | 76 | 2 |
| 9 | 1 | 22 | 75 | 2 |
| 10 | 1 | 23 | 75 | 1 |
| 11 | 1 | 24 | 74 | 1 |
| 12 | 1 | 26 | 72 | 1 |
| 13 | 1 | 27 | 71 | 1 |
| 14 | 1 | 29 | 69 | 1 |
| 15 | 1 | 30 | 69 | 0 |
| 16 | 1 | 32 | 67 | 0 |
| 17 | 1 | 33 | 66 | 0 |
| 18 | 1 | 35 | 64 | 0 |
| 19 | 1 | 36 | 63 | 0 |
| 20 | 1 | 38 | 61 | 0 |
| 21 | 1 | 39 | 60 | 0 |
| 22 | 1 | 41 | 58 | 0 |
| 23 | 1 | 42 | 57 | 0 |
| 24 | 1 | 44 | 55 | 0 |
| 25 | 1 | 46 | 53 | 0 |
| 26 | 2 | 47 | 51 | 0 |
| 27 | 2 | 49 | 49 | 0 |
| 28 | 2 | 51 | 47 | 0 |
| 29 | 2 | 53 | 45 | 0 |
| 30 | 2 | 55 | 43 | 0 |
| 31 | 2 | 57 | 41 | 0 |
Wind in December
Winds average 5 km/h in December.
Across December, daily wind ranges from about 5 km/h on the calmest days to 6 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) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| 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 | 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 | 6 | calm |
| 22 | 6 | calm |
| 23 | 6 | calm |
| 24 | 6 | calm |
| 25 | 6 | calm |
| 26 | 6 | calm |
| 27 | 6 | calm |
| 28 | 6 | calm |
| 29 | 6 | calm |
| 30 | 6 | calm |
| 31 | 6 | calm |
Sunrise & sunset in December
Daylight runs from about 11 h 30 min at the start of December to 11 h 24 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 6 minutes over December. Sunrise moves from 5:44 AM to 5:58 AM, and sunset from 5:11 PM to 5:24 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) | 11.5 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 |
| Sunrise (AM) | 5:44 | 5:45 | 5:45 | 5:46 | 5:46 | 5:47 | 5:47 | 5:48 | 5:48 | 5:49 | 5:49 | 5:50 | 5:50 | 5:51 | 5:51 | 5:52 | 5:52 | 5:53 | 5:53 | 5:54 | 5:54 | 5:55 | 5:55 | 5:55 | 5:56 | 5:56 | 5:57 | 5:57 | 5:58 | 5:58 | 5:58 |
| Sunset (PM) | 5:11 | 5:11 | 5:12 | 5:12 | 5:12 | 5:13 | 5:13 | 5:13 | 5:14 | 5:14 | 5:14 | 5:15 | 5:15 | 5:16 | 5:16 | 5:16 | 5:17 | 5:17 | 5:18 | 5:18 | 5:19 | 5:19 | 5:20 | 5:20 | 5:21 | 5:21 | 5:22 | 5:22 | 5:23 | 5:23 | 5:24 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.5 | 5:44 | 5:11 |
| 2 | 11.4 | 5:45 | 5:11 |
| 3 | 11.4 | 5:45 | 5:12 |
| 4 | 11.4 | 5:46 | 5:12 |
| 5 | 11.4 | 5:46 | 5:12 |
| 6 | 11.4 | 5:47 | 5:13 |
| 7 | 11.4 | 5:47 | 5:13 |
| 8 | 11.4 | 5:48 | 5:13 |
| 9 | 11.4 | 5:48 | 5:14 |
| 10 | 11.4 | 5:49 | 5:14 |
| 11 | 11.4 | 5:49 | 5:14 |
| 12 | 11.4 | 5:50 | 5:15 |
| 13 | 11.4 | 5:50 | 5:15 |
| 14 | 11.4 | 5:51 | 5:16 |
| 15 | 11.4 | 5:51 | 5:16 |
| 16 | 11.4 | 5:52 | 5:16 |
| 17 | 11.4 | 5:52 | 5:17 |
| 18 | 11.4 | 5:53 | 5:17 |
| 19 | 11.4 | 5:53 | 5:18 |
| 20 | 11.4 | 5:54 | 5:18 |
| 21 | 11.4 | 5:54 | 5:19 |
| 22 | 11.4 | 5:55 | 5:19 |
| 23 | 11.4 | 5:55 | 5:20 |
| 24 | 11.4 | 5:55 | 5:20 |
| 25 | 11.4 | 5:56 | 5:21 |
| 26 | 11.4 | 5:56 | 5:21 |
| 27 | 11.4 | 5:57 | 5:22 |
| 28 | 11.4 | 5:57 | 5:22 |
| 29 | 11.4 | 5:58 | 5:23 |
| 30 | 11.4 | 5:58 | 5:23 |
| 31 | 11.4 | 5:58 | 5:24 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 4.45 kWh/m².
For context, solar energy here swings from a low near 3.82 kWh/m² to a high of 6.19 kWh/m² in March across the year — December's 4.45 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) | 4.1 | 4.1 | 4.1 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.4 | 4.4 | 4.4 | 4.4 | 4.5 | 4.5 | 4.5 | 4.5 | 4.6 | 4.6 | 4.6 | 4.6 | 4.7 | 4.7 | 4.7 | 4.7 | 4.8 | 4.8 |
| 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 | 4.1 | Bright |
| 2 | 4.1 | Bright |
| 3 | 4.1 | Bright |
| 4 | 4.2 | Bright |
| 5 | 4.2 | Bright |
| 6 | 4.2 | Bright |
| 7 | 4.2 | Bright |
| 8 | 4.2 | Bright |
| 9 | 4.3 | Bright |
| 10 | 4.3 | Bright |
| 11 | 4.3 | Bright |
| 12 | 4.3 | Bright |
| 13 | 4.3 | Bright |
| 14 | 4.4 | Bright |
| 15 | 4.4 | Bright |
| 16 | 4.4 | Bright |
| 17 | 4.4 | Bright |
| 18 | 4.5 | Bright |
| 19 | 4.5 | Bright |
| 20 | 4.5 | Bright |
| 21 | 4.5 | Bright |
| 22 | 4.6 | Bright |
| 23 | 4.6 | Bright |
| 24 | 4.6 | Bright |
| 25 | 4.6 | Bright |
| 26 | 4.7 | Bright |
| 27 | 4.7 | Bright |
| 28 | 4.7 | Bright |
| 29 | 4.7 | Bright |
| 30 | 4.8 | Bright |
| 31 | 4.8 | Bright |
Hazard calendar for San_Ramon_
None of San_Ramon_'s seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
San_Ramon_'s rainy season runs May–November, when most of the year's rain falls.
Is December a good time to visit San_Ramon_?
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 San_Ramon_ for sightseeing.
What to pack for San_Ramon_ in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, San_Ramon_ sees daytime highs around 27°C and nights near 20°C. Pack light clothes and rain gear. About 16 days see rain.
Sea temperature near San_Ramon_ in December
The nearest coast averages about 28°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 29 km away) is warmest in April at about 29°C and coldest in November 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) | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 28 |
| Comfort | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 29 | Tropical |
| Feb | 29 | Tropical |
| Mar | 29 | Tropical |
| Apr | 29 | Tropical |
| May | 29 | Tropical |
| Jun | 29 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 28 | Tropical |
| Nov | 28 | Warm |
| Dec | 28 | Tropical |
UV index in San_Ramon_ in December
Clear-sky midday UV in December peaks around 10 (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_Ramon_ peaks around February 22 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 10 (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) | 11 | 14 | 14 | 14 | 12 | 13 | 12 | 12 | 12 | 12 | 11 | 10 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 11 | Extreme |
| Feb | 14 | Extreme |
| Mar | 14 | Extreme |
| Apr | 14 | Extreme |
| May | 12 | Extreme |
| Jun | 13 | Extreme |
| Jul | 12 | Extreme |
| Aug | 12 | Extreme |
| Sep | 12 | Extreme |
| Oct | 12 | Extreme |
| Nov | 11 | Extreme |
| Dec | 10 | Very high |
Air quality in San_Ramon_ 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 San_Ramon_ is worst in May — around 18 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (January, 9 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) | 9 | 10 | 11 | 16 | 18 | 16 | 17 | 15 | 14 | 12 | 11 | 9 |
| Level | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 9 | Good |
| Feb | 10 | Good |
| Mar | 11 | Good |
| Apr | 16 | Moderate |
| May | 18 | Moderate |
| Jun | 16 | Moderate |
| Jul | 17 | Moderate |
| Aug | 15 | Moderate |
| Sep | 14 | Moderate |
| Oct | 12 | Moderate |
| Nov | 11 | Good |
| Dec | 9 | Good |
Where is San_Ramon_?
San_Ramon_ sits at 10.1°N, 84.5°W, 0 m above sea level, in Costa Rica. The nearest listed city is Esparza, 24 km away.
Topography around San_Ramon_
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San_Ramon_.
Within 3 km, the terrain around San_Ramon_ has significant variations in elevation — a maximum elevation change of 294 m around an average of 1,066 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,914 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,414 m.
The land around San_Ramon_ is covered by trees (53%), artificial surfaces (25%) and grassland (21%) within 3 km, trees (68%) and grassland (27%) within 16 km, and trees (61%) within 80 km.
Costa Rica travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 59% of US
- price level, 2025
- GDP per capita
- $19,970
- 2025
- Happiness
- 7.4 / 10
- World Happiness, 2025
- Safe drinking water
- 81%
- of population, 2024
- Homicide rate
- 17.7
- per 100k, 2023
- Road deaths
- 14.8
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 516
- 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_Ramon_ (10.088°, -84.4702°, elevation 0 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).