Jaco weather in January
In January, Jaco sees average daytime highs of 27°C and overnight lows near 26°C, with 28 mm of rain across 6.3 wet days and about 11.5 hours of daylight. It is the 5th-warmest and 10th-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 68% of the time in January, and the air most often feels oppressive.
Daylight stretches from about 11 h 24 min at the start of January to 11 h 36 min by month's end. Set against the rest of the year, January is Jaco's 2nd-clearest and 10th-windiest month. For the whole year in context, see Jaco's year-round climate.
- Daytime high
- 27°
- 5th warmest
- Overnight low
- 26°
- 9th coldest
- Rainfall
- 28 mm
- 6.3 wet days
- Daylight
- 11 h 30 min
- 6:03 AM – 5:33 PM
- Cloud cover
- 33%
- 2nd clearest
- Wind
- 9 km/h
- 10th windiest
- Solar energy
- 5.42 kWh/m²
- Travel score
- 7.4
- out of 10
Temperature in January
Day-to-day highs hold fairly steady near 27°C through the month.
A typical January day in Jaco reaches about 27°C in the afternoon and slips back to 26°C overnight — a 1°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, January runs on par with December and on par with February.
| 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 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| Avg low (°C) | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 27 | 26 |
| 2 | 27 | 26 |
| 3 | 27 | 26 |
| 4 | 27 | 26 |
| 5 | 27 | 26 |
| 6 | 27 | 26 |
| 7 | 27 | 26 |
| 8 | 27 | 26 |
| 9 | 27 | 26 |
| 10 | 27 | 26 |
| 11 | 27 | 26 |
| 12 | 27 | 26 |
| 13 | 27 | 26 |
| 14 | 27 | 26 |
| 15 | 27 | 26 |
| 16 | 27 | 26 |
| 17 | 27 | 26 |
| 18 | 27 | 26 |
| 19 | 27 | 26 |
| 20 | 27 | 26 |
| 21 | 27 | 26 |
| 22 | 27 | 26 |
| 23 | 27 | 26 |
| 24 | 27 | 26 |
| 25 | 28 | 26 |
| 26 | 28 | 26 |
| 27 | 28 | 26 |
| 28 | 28 | 26 |
| 29 | 28 | 26 |
| 30 | 28 | 26 |
| 31 | 28 | 26 |
Jaco weather by month
How January compares with the rest of the year at a glance. January is the 5th-warmest and 10th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 27° / 26° | 28 | 6.3 | 11.5 | 7.4 |
| Feb | 28° / 27° | 16 | 3.4 | 11.7 | 7.9 |
| Mar | 28° / 27° | 23 | 5.8 | 11.9 | 7.3 |
| Apr | 28° / 26° | 108 | 18.4 | 12.2 | 5.1 |
| May | 28° / 26° | 405 | 28.3 | 12.4 | 3.6 |
| Jun | 27° / 26° | 430 | 28.4 | 12.6 | 3.4 |
| Jul | 27° / 26° | 456 | 29 | 12.5 | 3.4 |
| Aug | 27° / 26° | 506 | 29.4 | 12.3 | 3.4 |
| Sep | 27° / 25° | 470 | 29.1 | 12.1 | 3.4 |
| Oct | 27° / 25° | 571 | 29.3 | 11.8 | 3.5 |
| Nov | 27° / 25° | 371 | 25.6 | 11.6 | 4.1 |
| Dec | 27° / 26° | 123 | 15.2 | 11.4 | 5.9 |
Cloud cover in January
The sky is clear or mostly clear about 68% of the time in January.
Beyond those clear spells, partly cloudy skies cover about 15% of January, with mostly cloudy or overcast conditions the remaining 17%. 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 (%) | 77 | 77 | 77 | 78 | 78 | 79 | 80 | 80 | 81 | 82 | 82 | 82 | 83 | 83 | 83 | 84 | 84 | 84 | 84 | 84 | 85 | 85 | 85 | 85 | 86 | 86 | 87 | 87 | 87 | 88 | 88 |
| Cloudier (%) | 23 | 23 | 23 | 22 | 22 | 21 | 20 | 20 | 19 | 18 | 18 | 18 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 13 | 13 | 12 | 12 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 77 | 23 |
| 2 | 77 | 23 |
| 3 | 77 | 23 |
| 4 | 78 | 22 |
| 5 | 78 | 22 |
| 6 | 79 | 21 |
| 7 | 80 | 20 |
| 8 | 80 | 20 |
| 9 | 81 | 19 |
| 10 | 82 | 18 |
| 11 | 82 | 18 |
| 12 | 82 | 18 |
| 13 | 83 | 17 |
| 14 | 83 | 17 |
| 15 | 83 | 17 |
| 16 | 84 | 16 |
| 17 | 84 | 16 |
| 18 | 84 | 16 |
| 19 | 84 | 16 |
| 20 | 84 | 16 |
| 21 | 85 | 15 |
| 22 | 85 | 15 |
| 23 | 85 | 15 |
| 24 | 85 | 15 |
| 25 | 86 | 14 |
| 26 | 86 | 14 |
| 27 | 87 | 13 |
| 28 | 87 | 13 |
| 29 | 87 | 13 |
| 30 | 88 | 12 |
| 31 | 88 | 12 |
Chance of precipitation in January
Jaco gets around 28 mm of rain over 6.3 wet days in January. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 21% 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 | 33 | 32 | 31 | 30 | 29 | 28 | 26 | 25 | 24 | 24 | 23 | 22 | 21 | 21 | 20 | 19 | 19 | 18 | 18 | 17 | 16 | 16 | 15 | 14 | 14 | 13 | 13 | 12 | 12 | 12 |
| Rain chance (%) | |
|---|---|
| 1 | 34 |
| 2 | 33 |
| 3 | 32 |
| 4 | 31 |
| 5 | 30 |
| 6 | 29 |
| 7 | 28 |
| 8 | 26 |
| 9 | 25 |
| 10 | 24 |
| 11 | 24 |
| 12 | 23 |
| 13 | 22 |
| 14 | 21 |
| 15 | 21 |
| 16 | 20 |
| 17 | 19 |
| 18 | 19 |
| 19 | 18 |
| 20 | 18 |
| 21 | 17 |
| 22 | 16 |
| 23 | 16 |
| 24 | 15 |
| 25 | 14 |
| 26 | 14 |
| 27 | 13 |
| 28 | 13 |
| 29 | 12 |
| 30 | 12 |
| 31 | 12 |
Humidity in January
Most of January feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, January lands in the oppressive band about 91% of days. Sticky, muggy-or-worse air turns up on roughly 100% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Muggy (%) | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| Oppressive (%) | 92 | 92 | 92 | 93 | 92 | 92 | 92 | 91 | 91 | 92 | 91 | 91 | 91 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 91 | 91 | 90 | 90 | 90 | 90 | 90 |
| Miserable (%) | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 |
| Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|
| 1 | 4 | 92 | 4 |
| 2 | 4 | 92 | 4 |
| 3 | 4 | 92 | 4 |
| 4 | 4 | 93 | 3 |
| 5 | 5 | 92 | 3 |
| 6 | 5 | 92 | 3 |
| 7 | 5 | 92 | 3 |
| 8 | 6 | 91 | 3 |
| 9 | 6 | 91 | 3 |
| 10 | 6 | 92 | 2 |
| 11 | 7 | 91 | 2 |
| 12 | 7 | 91 | 2 |
| 13 | 7 | 91 | 2 |
| 14 | 8 | 90 | 2 |
| 15 | 8 | 90 | 2 |
| 16 | 8 | 90 | 2 |
| 17 | 8 | 90 | 2 |
| 18 | 8 | 90 | 2 |
| 19 | 8 | 90 | 2 |
| 20 | 8 | 90 | 2 |
| 21 | 8 | 90 | 2 |
| 22 | 8 | 90 | 2 |
| 23 | 8 | 90 | 2 |
| 24 | 8 | 90 | 2 |
| 25 | 7 | 91 | 2 |
| 26 | 7 | 91 | 2 |
| 27 | 7 | 90 | 3 |
| 28 | 7 | 90 | 3 |
| 29 | 7 | 90 | 3 |
| 30 | 7 | 90 | 3 |
| 31 | 7 | 90 | 3 |
Wind in January
Winds average 9 km/h in January.
Across January, daily wind ranges from about 9 km/h on the calmest days to 9 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) | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| 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 | 9 | calm |
| 2 | 9 | calm |
| 3 | 9 | calm |
| 4 | 9 | calm |
| 5 | 9 | calm |
| 6 | 9 | calm |
| 7 | 9 | calm |
| 8 | 9 | calm |
| 9 | 9 | calm |
| 10 | 9 | calm |
| 11 | 9 | calm |
| 12 | 9 | calm |
| 13 | 9 | calm |
| 14 | 9 | calm |
| 15 | 9 | calm |
| 16 | 9 | calm |
| 17 | 9 | calm |
| 18 | 9 | calm |
| 19 | 9 | calm |
| 20 | 9 | calm |
| 21 | 9 | calm |
| 22 | 9 | calm |
| 23 | 9 | calm |
| 24 | 9 | calm |
| 25 | 9 | calm |
| 26 | 9 | calm |
| 27 | 9 | calm |
| 28 | 9 | calm |
| 29 | 9 | calm |
| 30 | 9 | calm |
| 31 | 9 | calm |
Sunrise & sunset in January
Daylight runs from about 11 h 24 min at the start of January to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 12 minutes over January. Sunrise moves from 5:58 AM to 6:05 AM, and sunset from 5:25 PM to 5:39 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) | 11.4 | 11.4 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 |
| Sunrise (AM) | 5:58 | 5:59 | 5:59 | 5:59 | 6:00 | 6:00 | 6:00 | 6:01 | 6:01 | 6:01 | 6:02 | 6:02 | 6:02 | 6:02 | 6:03 | 6:03 | 6:03 | 6:03 | 6:04 | 6:04 | 6:04 | 6:04 | 6:04 | 6:04 | 6:04 | 6:04 | 6:04 | 6:05 | 6:05 | 6:05 | 6:05 |
| Sunset (PM) | 5:25 | 5:26 | 5:26 | 5:27 | 5:27 | 5:28 | 5:28 | 5:29 | 5:29 | 5:30 | 5:30 | 5:31 | 5:31 | 5:32 | 5:32 | 5:33 | 5:33 | 5:34 | 5:34 | 5:35 | 5:35 | 5:35 | 5:36 | 5:36 | 5:37 | 5:37 | 5:38 | 5:38 | 5:38 | 5:39 | 5:39 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.4 | 5:58 | 5:25 |
| 2 | 11.4 | 5:59 | 5:26 |
| 3 | 11.5 | 5:59 | 5:26 |
| 4 | 11.5 | 5:59 | 5:27 |
| 5 | 11.5 | 6:00 | 5:27 |
| 6 | 11.5 | 6:00 | 5:28 |
| 7 | 11.5 | 6:00 | 5:28 |
| 8 | 11.5 | 6:01 | 5:29 |
| 9 | 11.5 | 6:01 | 5:29 |
| 10 | 11.5 | 6:01 | 5:30 |
| 11 | 11.5 | 6:02 | 5:30 |
| 12 | 11.5 | 6:02 | 5:31 |
| 13 | 11.5 | 6:02 | 5:31 |
| 14 | 11.5 | 6:02 | 5:32 |
| 15 | 11.5 | 6:03 | 5:32 |
| 16 | 11.5 | 6:03 | 5:33 |
| 17 | 11.5 | 6:03 | 5:33 |
| 18 | 11.5 | 6:03 | 5:34 |
| 19 | 11.5 | 6:04 | 5:34 |
| 20 | 11.5 | 6:04 | 5:35 |
| 21 | 11.5 | 6:04 | 5:35 |
| 22 | 11.5 | 6:04 | 5:35 |
| 23 | 11.5 | 6:04 | 5:36 |
| 24 | 11.5 | 6:04 | 5:36 |
| 25 | 11.5 | 6:04 | 5:37 |
| 26 | 11.5 | 6:04 | 5:37 |
| 27 | 11.6 | 6:04 | 5:38 |
| 28 | 11.6 | 6:05 | 5:38 |
| 29 | 11.6 | 6:05 | 5:38 |
| 30 | 11.6 | 6:05 | 5:39 |
| 31 | 11.6 | 6:05 | 5:39 |
Solar energy in January
Average shortwave solar energy reaching the ground each day in January, about 5.42 kWh/m².
For context, solar energy here swings from a low near 4.12 kWh/m² to a high of 6.51 kWh/m² in March across the year — January's 5.42 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) | 5.1 | 5.1 | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.4 | 5.4 | 5.4 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.6 | 5.6 | 5.6 | 5.6 | 5.7 | 5.7 | 5.7 | 5.7 | 5.8 | 5.8 |
| 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 | 5.1 | Bright |
| 2 | 5.1 | Bright |
| 3 | 5.2 | Bright |
| 4 | 5.2 | Bright |
| 5 | 5.2 | Bright |
| 6 | 5.2 | Bright |
| 7 | 5.2 | Bright |
| 8 | 5.2 | Bright |
| 9 | 5.3 | Bright |
| 10 | 5.3 | Bright |
| 11 | 5.3 | Bright |
| 12 | 5.3 | Bright |
| 13 | 5.3 | Bright |
| 14 | 5.4 | Bright |
| 15 | 5.4 | Bright |
| 16 | 5.4 | Bright |
| 17 | 5.5 | Bright |
| 18 | 5.5 | Bright |
| 19 | 5.5 | Bright |
| 20 | 5.5 | Bright |
| 21 | 5.5 | Bright |
| 22 | 5.6 | Bright |
| 23 | 5.6 | Bright |
| 24 | 5.6 | Bright |
| 25 | 5.6 | Bright |
| 26 | 5.7 | Bright |
| 27 | 5.7 | Bright |
| 28 | 5.7 | Bright |
| 29 | 5.7 | Bright |
| 30 | 5.8 | Bright |
| 31 | 5.8 | Bright |
Hazard calendar for Jaco
None of Jaco's seasonal hazards are active in January. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Jaco's rainy season runs May–November, when most of the year's rain falls.
Is January a good time to visit Jaco?
Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
January is one of the better times to visit Jaco for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Jaco in January
From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In January, Jaco sees daytime highs around 27°C and nights near 26°C. Pack light clothes. Worth having: sun protection. About 6 days see rain.
Sea temperature near Jaco in January
The nearest coast averages about 29°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore 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 Jaco in January
Clear-sky midday UV in January 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 Jaco peaks around March 15 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 9 (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 | 13 | 13 | 13 | 12 | 13 | 11 | 12 | 12 | 11 | 11 | 9 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 11 | Extreme |
| Feb | 13 | Extreme |
| Mar | 13 | Extreme |
| Apr | 13 | Extreme |
| May | 12 | Extreme |
| Jun | 13 | Extreme |
| Jul | 11 | Extreme |
| Aug | 12 | Extreme |
| Sep | 12 | Extreme |
| Oct | 11 | Extreme |
| Nov | 11 | Extreme |
| Dec | 9 | Very high |
Air quality in Jaco in January
Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.
Air quality in Jaco 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 Jaco?
Jaco sits at 9.6°N, 84.6°W, 0 m above sea level, in Costa Rica. The nearest listed city is Esparza, 42 km away.
Topography around Jaco
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Jaco.
Within 3 km, the terrain around Jaco has significant variations in elevation — a maximum elevation change of 401 m around an average of 35 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 802 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,811 m.
The land around Jaco is covered by water (38%) and trees (31%) within 3 km, water (56%) and trees (35%) within 16 km, and trees (45%) and water (43%) 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 Jaco (9.615°, -84.6298°, 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).