Bay weather in January
In January, Bay sees average daytime highs of 27°C and overnight lows near 23°C, with 40 mm of rain across 4.6 wet days and about 11.3 hours of daylight. It is the 12th-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 27% of the time in January, and the air most often feels oppressive.
Daylight stretches from about 11 h 12 min at the start of January to 11 h 24 min by month's end. Set against the rest of the year, January is Bay's 4th-clearest and 2nd-windiest month. For the whole year in context, see Bay's year-round climate.
- Daytime high
- 27°
- 12th warmest
- Overnight low
- 23°
- 2nd coldest
- Rainfall
- 40 mm
- 4.6 wet days
- Daylight
- 11 h 12 min
- 6:27 AM – 5:42 PM
- Cloud cover
- 60%
- 4th clearest
- Wind
- 13 km/h
- 2nd windiest
- Solar energy
- 4.28 kWh/m²
- Travel score
- 7.2
- out of 10
Bay is municipality of the Philippines in the province of Laguna.
- Density
- 786/km²
- people per km²
- Founded
- 1578
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in January
Day-to-day highs hold fairly steady near 27°C through the month.
A typical January day in Bay reaches about 27°C in the afternoon and slips back to 23°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 28°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 | 27 | 27 | 27 | 27 | 27 | 27 | 27 |
| Avg low (°C) | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 27 | 24 |
| 2 | 27 | 24 |
| 3 | 27 | 23 |
| 4 | 27 | 23 |
| 5 | 27 | 23 |
| 6 | 27 | 23 |
| 7 | 27 | 23 |
| 8 | 27 | 23 |
| 9 | 27 | 23 |
| 10 | 27 | 23 |
| 11 | 27 | 23 |
| 12 | 27 | 23 |
| 13 | 27 | 23 |
| 14 | 27 | 23 |
| 15 | 27 | 23 |
| 16 | 27 | 23 |
| 17 | 27 | 23 |
| 18 | 27 | 23 |
| 19 | 27 | 23 |
| 20 | 27 | 23 |
| 21 | 27 | 23 |
| 22 | 27 | 23 |
| 23 | 27 | 23 |
| 24 | 27 | 23 |
| 25 | 27 | 23 |
| 26 | 27 | 23 |
| 27 | 27 | 23 |
| 28 | 27 | 23 |
| 29 | 27 | 23 |
| 30 | 27 | 23 |
| 31 | 27 | 23 |
How January really feels in Bay
Once humidity and wind are folded in, January 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.
January sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Bay weather by month
How January compares with the rest of the year at a glance. January is the 12th-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 | 27° / 23° | 40 | 4.6 | 11.3 | 7.2 |
| Feb | 27° / 23° | 27 | 3.8 | 11.5 | 7.3 |
| Mar | 29° / 24° | 33 | 4.6 | 11.9 | 6.6 |
| Apr | 30° / 25° | 37 | 6.1 | 12.3 | 5.3 |
| May | 31° / 25° | 170 | 19.2 | 12.6 | 3.5 |
| Jun | 31° / 25° | 243 | 25.8 | 12.8 | 2.8 |
| Jul | 30° / 25° | 368 | 28.9 | 12.8 | 2.8 |
| Aug | 29° / 25° | 301 | 27.9 | 12.5 | 3.0 |
| Sep | 29° / 25° | 314 | 27.1 | 12.1 | 3.0 |
| Oct | 29° / 25° | 194 | 19.4 | 11.7 | 4.1 |
| Nov | 28° / 25° | 103 | 10.6 | 11.3 | 5.6 |
| Dec | 27° / 24° | 141 | 10.4 | 11.2 | 6.3 |
Cloud cover in January
The sky is clear or mostly clear about 27% of the time in January.
Beyond those clear spells, partly cloudy skies cover about 27% of January, with mostly cloudy or overcast conditions the remaining 47%.
| 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 (%) | 48 | 49 | 49 | 51 | 50 | 51 | 51 | 51 | 51 | 50 | 51 | 51 | 51 | 51 | 51 | 52 | 52 | 52 | 53 | 53 | 54 | 55 | 56 | 57 | 57 | 58 | 59 | 59 | 59 | 59 | 60 |
| Cloudier (%) | 52 | 51 | 51 | 49 | 50 | 49 | 49 | 49 | 49 | 50 | 49 | 49 | 49 | 49 | 49 | 48 | 48 | 48 | 47 | 47 | 46 | 45 | 44 | 43 | 43 | 42 | 41 | 41 | 41 | 41 | 40 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 48 | 52 |
| 2 | 49 | 51 |
| 3 | 49 | 51 |
| 4 | 51 | 49 |
| 5 | 50 | 50 |
| 6 | 51 | 49 |
| 7 | 51 | 49 |
| 8 | 51 | 49 |
| 9 | 51 | 49 |
| 10 | 50 | 50 |
| 11 | 51 | 49 |
| 12 | 51 | 49 |
| 13 | 51 | 49 |
| 14 | 51 | 49 |
| 15 | 51 | 49 |
| 16 | 52 | 48 |
| 17 | 52 | 48 |
| 18 | 52 | 48 |
| 19 | 53 | 47 |
| 20 | 53 | 47 |
| 21 | 54 | 46 |
| 22 | 55 | 45 |
| 23 | 56 | 44 |
| 24 | 57 | 43 |
| 25 | 57 | 43 |
| 26 | 58 | 42 |
| 27 | 59 | 41 |
| 28 | 59 | 41 |
| 29 | 59 | 41 |
| 30 | 59 | 41 |
| 31 | 60 | 40 |
Chance of precipitation in January
Bay gets around 40 mm of rain over 4.6 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 16% and peaks near 22% 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 (%) | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 |
| Rain chance (%) | |
|---|---|
| 1 | 22 |
| 2 | 21 |
| 3 | 20 |
| 4 | 19 |
| 5 | 18 |
| 6 | 17 |
| 7 | 16 |
| 8 | 16 |
| 9 | 15 |
| 10 | 15 |
| 11 | 15 |
| 12 | 15 |
| 13 | 15 |
| 14 | 15 |
| 15 | 15 |
| 16 | 15 |
| 17 | 15 |
| 18 | 15 |
| 19 | 15 |
| 20 | 15 |
| 21 | 15 |
| 22 | 15 |
| 23 | 15 |
| 24 | 15 |
| 25 | 15 |
| 26 | 14 |
| 27 | 14 |
| 28 | 14 |
| 29 | 14 |
| 30 | 14 |
| 31 | 14 |
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 71% of days. Sticky, muggy-or-worse air turns up on roughly 99% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Humid (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Muggy (%) | 23 | 23 | 24 | 24 | 25 | 25 | 26 | 26 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 30 | 30 | 31 | 31 | 32 | 32 |
| Oppressive (%) | 74 | 74 | 73 | 74 | 73 | 73 | 72 | 72 | 72 | 72 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 70 | 70 | 70 | 70 | 70 | 70 | 69 | 69 | 68 | 68 | 67 | 67 |
| Miserable (%) | 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 | 0 | 0 | 0 | 0 | 0 | 0 |
| Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|
| 1 | 1 | 23 | 74 | 2 |
| 2 | 1 | 23 | 74 | 2 |
| 3 | 1 | 24 | 73 | 2 |
| 4 | 1 | 24 | 74 | 1 |
| 5 | 1 | 25 | 73 | 1 |
| 6 | 1 | 25 | 73 | 1 |
| 7 | 1 | 26 | 72 | 1 |
| 8 | 1 | 26 | 72 | 1 |
| 9 | 1 | 27 | 72 | 0 |
| 10 | 1 | 27 | 72 | 0 |
| 11 | 1 | 28 | 71 | 0 |
| 12 | 1 | 28 | 71 | 0 |
| 13 | 1 | 28 | 71 | 0 |
| 14 | 1 | 28 | 71 | 0 |
| 15 | 1 | 28 | 71 | 0 |
| 16 | 1 | 28 | 71 | 0 |
| 17 | 1 | 28 | 71 | 0 |
| 18 | 1 | 28 | 71 | 0 |
| 19 | 1 | 28 | 71 | 0 |
| 20 | 1 | 29 | 70 | 0 |
| 21 | 1 | 29 | 70 | 0 |
| 22 | 1 | 29 | 70 | 0 |
| 23 | 1 | 29 | 70 | 0 |
| 24 | 1 | 29 | 70 | 0 |
| 25 | 1 | 29 | 70 | 0 |
| 26 | 1 | 30 | 69 | 0 |
| 27 | 1 | 30 | 69 | 0 |
| 28 | 1 | 31 | 68 | 0 |
| 29 | 1 | 31 | 68 | 0 |
| 30 | 1 | 32 | 67 | 0 |
| 31 | 1 | 32 | 67 | 0 |
Wind in January
Winds average 13 km/h in January.
Across January, daily wind ranges from about 13 km/h on the calmest days to 13 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) | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 |
| Feels | 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 | 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 | 13 | light breeze |
| 2 | 13 | light breeze |
| 3 | 13 | light breeze |
| 4 | 13 | light breeze |
| 5 | 13 | light breeze |
| 6 | 13 | light breeze |
| 7 | 13 | light breeze |
| 8 | 13 | light breeze |
| 9 | 13 | light breeze |
| 10 | 13 | light breeze |
| 11 | 13 | light breeze |
| 12 | 13 | light breeze |
| 13 | 13 | light breeze |
| 14 | 13 | light breeze |
| 15 | 13 | light breeze |
| 16 | 13 | light breeze |
| 17 | 13 | light breeze |
| 18 | 13 | light breeze |
| 19 | 13 | light breeze |
| 20 | 13 | light breeze |
| 21 | 13 | light breeze |
| 22 | 13 | light breeze |
| 23 | 13 | light breeze |
| 24 | 13 | light breeze |
| 25 | 13 | light breeze |
| 26 | 13 | light breeze |
| 27 | 13 | light breeze |
| 28 | 13 | light breeze |
| 29 | 13 | light breeze |
| 30 | 13 | light breeze |
| 31 | 13 | light breeze |
Sunrise & sunset in January
Daylight runs from about 11 h 12 min at the start of January to 11 h 24 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 6:23 AM to 6:27 AM, and sunset from 5:33 PM to 5:49 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) | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.4 | 11.4 |
| Sunrise (AM) | 6:23 | 6:23 | 6:23 | 6:24 | 6:24 | 6:24 | 6:25 | 6:25 | 6:25 | 6:26 | 6:26 | 6:26 | 6:26 | 6:26 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 |
| Sunset (PM) | 5:33 | 5:34 | 5:34 | 5:35 | 5:35 | 5:36 | 5:37 | 5:37 | 5:38 | 5:38 | 5:39 | 5:39 | 5:40 | 5:40 | 5:41 | 5:42 | 5:42 | 5:43 | 5:43 | 5:44 | 5:44 | 5:45 | 5:45 | 5:46 | 5:46 | 5:47 | 5:47 | 5:48 | 5:48 | 5:49 | 5:49 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.2 | 6:23 | 5:33 |
| 2 | 11.2 | 6:23 | 5:34 |
| 3 | 11.2 | 6:23 | 5:34 |
| 4 | 11.2 | 6:24 | 5:35 |
| 5 | 11.2 | 6:24 | 5:35 |
| 6 | 11.2 | 6:24 | 5:36 |
| 7 | 11.2 | 6:25 | 5:37 |
| 8 | 11.2 | 6:25 | 5:37 |
| 9 | 11.2 | 6:25 | 5:38 |
| 10 | 11.2 | 6:26 | 5:38 |
| 11 | 11.2 | 6:26 | 5:39 |
| 12 | 11.2 | 6:26 | 5:39 |
| 13 | 11.2 | 6:26 | 5:40 |
| 14 | 11.2 | 6:26 | 5:40 |
| 15 | 11.2 | 6:27 | 5:41 |
| 16 | 11.2 | 6:27 | 5:42 |
| 17 | 11.3 | 6:27 | 5:42 |
| 18 | 11.3 | 6:27 | 5:43 |
| 19 | 11.3 | 6:27 | 5:43 |
| 20 | 11.3 | 6:27 | 5:44 |
| 21 | 11.3 | 6:27 | 5:44 |
| 22 | 11.3 | 6:27 | 5:45 |
| 23 | 11.3 | 6:27 | 5:45 |
| 24 | 11.3 | 6:27 | 5:46 |
| 25 | 11.3 | 6:27 | 5:46 |
| 26 | 11.3 | 6:27 | 5:47 |
| 27 | 11.3 | 6:27 | 5:47 |
| 28 | 11.3 | 6:27 | 5:48 |
| 29 | 11.3 | 6:27 | 5:48 |
| 30 | 11.4 | 6:27 | 5:49 |
| 31 | 11.4 | 6:27 | 5:49 |
Solar energy in January
Average shortwave solar energy reaching the ground each day in January, about 4.28 kWh/m².
For context, solar energy here swings from a low near 3.79 kWh/m² to a high of 6.37 kWh/m² in April across the year — January's 4.28 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) | 4.0 | 4.0 | 4.0 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.2 | 4.2 | 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 |
| 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 | 4.0 | Bright |
| 2 | 4.0 | Bright |
| 3 | 4.0 | Bright |
| 4 | 4.1 | Bright |
| 5 | 4.1 | Bright |
| 6 | 4.1 | Bright |
| 7 | 4.1 | Bright |
| 8 | 4.1 | Bright |
| 9 | 4.1 | Bright |
| 10 | 4.1 | Bright |
| 11 | 4.1 | Bright |
| 12 | 4.2 | Bright |
| 13 | 4.2 | Bright |
| 14 | 4.2 | Bright |
| 15 | 4.2 | Bright |
| 16 | 4.2 | Bright |
| 17 | 4.2 | Bright |
| 18 | 4.2 | Bright |
| 19 | 4.3 | Bright |
| 20 | 4.3 | Bright |
| 21 | 4.3 | Bright |
| 22 | 4.3 | Bright |
| 23 | 4.3 | Bright |
| 24 | 4.4 | Bright |
| 25 | 4.4 | Bright |
| 26 | 4.4 | Bright |
| 27 | 4.4 | Bright |
| 28 | 4.5 | Bright |
| 29 | 4.5 | Bright |
| 30 | 4.5 | Bright |
| 31 | 4.5 | Bright |
Hazard calendar for Bay
In January, Bay sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Bay sits in the Pacific typhoon belt; the season peaks July–October.
Bay's monsoon runs May–October, when most of the year's rain falls.
Is January a good time to visit Bay?
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 Bay for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Bay in January
From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In January, Bay sees daytime highs around 27°C and nights near 23°C. Worth packing: light clothes. About 5 days see rain.
Sea temperature near Bay in January
The nearest coast averages about 27°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 49 km away) is warmest in June at about 30°C and coldest in February near 27°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) | 27 | 27 | 27 | 29 | 30 | 30 | 29 | 29 | 29 | 29 | 28 | 27 |
| Comfort | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 27 | Warm |
| Mar | 27 | Warm |
| Apr | 29 | Tropical |
| May | 30 | Tropical |
| Jun | 30 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 28 | Tropical |
| Dec | 27 | Warm |
UV index in Bay in January
Clear-sky midday UV in January 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 Bay peaks around August 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 22 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) | 10 | 11 | 13 | 13 | 12 | 12 | 12 | 14 | 13 | 11 | 9 | 9 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Very high |
| Feb | 11 | Extreme |
| Mar | 13 | Extreme |
| Apr | 13 | Extreme |
| May | 12 | Extreme |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 14 | Extreme |
| Sep | 13 | Extreme |
| Oct | 11 | Extreme |
| Nov | 9 | Very high |
| Dec | 9 | Very high |
Air quality in Bay 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 Bay is worst in September — around 32 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (February, 15 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) | 17 | 15 | 17 | 17 | 23 | 29 | 28 | 28 | 32 | 27 | 19 | 16 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 17 | Moderate |
| Feb | 15 | Moderate |
| Mar | 17 | Moderate |
| Apr | 17 | Moderate |
| May | 23 | Moderate |
| Jun | 29 | Moderate |
| Jul | 28 | Moderate |
| Aug | 28 | Moderate |
| Sep | 32 | Moderate |
| Oct | 27 | Moderate |
| Nov | 19 | Moderate |
| Dec | 16 | Moderate |
Where is Bay?
Bay sits at 14.2°N, 121.3°E, 11 m above sea level, in Philippines. The nearest listed city is Calauan, 5.0 km away.
Topography around Bay
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Bay.
Within 3 km, the terrain around Bay has only modest variations in elevation — a maximum elevation change of 22 m around an average of 6 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,088 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,141 m.
The land around Bay is covered by cropland (43%) and water (24%) within 3 km, trees (49%) and water (30%) within 16 km, and trees (44%) and water (43%) within 80 km.
Philippines travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B / C
- 230 V · 60 Hz
- Prices
- ≈ 33% of US
- price level, 2025
- GDP per capita
- $4,171
- 2025
- Happiness
- 6.2 / 10
- World Happiness, 2025
- Safe drinking water
- 48%
- of population, 2024
- Homicide rate
- 4.3
- per 100k, 2023
- Road deaths
- 12
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- High
- EF EPI 569
- 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 Bay (14.1837°, 121.2855°, elevation 11 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).