Diadi weather in September

In September, Diadi sees average daytime highs of 29°C and overnight lows near 22°C, with 455 mm of rain across 25.4 wet days and about 12.1 hours of daylight. It is the 5th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 7% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 18 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Diadi's 11th-clearest and 11th-windiest month. For the whole year in context, see Diadi's year-round climate.

Daytime high: 29°; 5th warmest
Overnight low: 22°; 10th coldest
Rainfall: 455 mm; 25.4 wet days
Daylight: 12 h 06 min; 5:46 AM – 5:52 PM
Cloud cover: 83%; 11th clearest
Wind: 4 km/h; 11th windiest
Solar energy: 4.65 kWh/m²
Travel score: 3.3; out of 10

Diadi is municipality of the Philippines in the province of Nueva Vizcaya.

Density: 86/km²; people per km²
Founded: 1967

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← August Diadi year-round climate October →Best places to visit in September

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical September day in Diadi reaches about 29°C in the afternoon and slips back to 22°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 31°C. Set against its neighbours, September runs on par with August and about 1°C warmer than October.

	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
Avg high (°C)	30	30	30	30	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29
Avg low (°C)	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22

	Avg high (°C)	Avg low (°C)
1	30	22
2	30	22
3	30	22
4	30	22
5	29	22
6	29	22
7	29	22
8	29	22
9	29	22
10	29	22
11	29	22
12	29	22
13	29	22
14	29	22
15	29	22
16	29	22
17	29	22
18	29	22
19	29	22
20	29	22
21	29	22
22	29	22
23	29	22
24	29	22
25	29	22
26	29	22
27	29	22
28	29	22
29	29	22
30	29	22

How September really feels in Diadi

Once humidity and wind are folded in, September averages 20 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Diadi weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 2nd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	24° / 18°	209	21.2	11.1	5.1
Feb	25° / 18°	176	18.2	11.4	5.2
Mar	27° / 19°	154	15.8	11.9	5.8
Apr	29° / 21°	139	14.3	12.4	5.2
May	30° / 21°	362	19.3	12.8	3.8
Jun	31° / 22°	265	19.6	13	3.4
Jul	30° / 22°	399	24.4	12.9	3.2
Aug	30° / 22°	489	26.4	12.6	3.0
Sep	29° / 22°	455	25.4	12.1	3.3
Oct	28° / 21°	270	20.7	11.6	4.5
Nov	26° / 20°	193	16.8	11.2	5.4
Dec	25° / 19°	258	20.7	11	5.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 7% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 10% of September, with mostly cloudy or overcast conditions the remaining 83%.

	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
Clearer (%)	13	14	14	14	14	14	14	14	14	14	15	15	15	15	15	15	16	16	16	17	17	19	19	19	21	21	21	23	23	24
Cloudier (%)	87	86	86	86	86	86	86	86	86	86	85	85	85	85	85	85	84	84	84	83	83	81	81	81	79	79	79	77	77	76

	Clearer (%)	Cloudier (%)
1	13	87
2	14	86
3	14	86
4	14	86
5	14	86
6	14	86
7	14	86
8	14	86
9	14	86
10	14	86
11	15	85
12	15	85
13	15	85
14	15	85
15	15	85
16	15	85
17	16	84
18	16	84
19	16	84
20	17	83
21	17	83
22	19	81
23	19	81
24	19	81
25	21	79
26	21	79
27	21	79
28	23	77
29	23	77
30	24	76

Chance of precipitation in September

Any precipitation

Diadi gets around 455 mm of rain over 25.4 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 84% and peaks near 87% 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
Rain chance (%)	86	86	86	86	86	86	87	87	87	87	86	86	86	85	85	84	84	84	83	83	82	82	81	81	80	79	79	78	77	77

	Rain chance (%)
1	86
2	86
3	86
4	86
5	86
6	86
7	87
8	87
9	87
10	87
11	86
12	86
13	86
14	85
15	85
16	84
17	84
18	84
19	83
20	83
21	82
22	82
23	81
24	81
25	80
26	79
27	79
28	78
29	77
30	77

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the oppressive band about 89% 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
Muggy (%)	6	6	6	6	6	6	6	6	7	7	7	8	9	9	10	10	11	12	12	13	13	13	14	15	16	17	18	19	20	21
Oppressive (%)	94	94	94	94	94	94	94	94	93	93	93	92	91	91	90	90	89	88	88	87	87	87	86	85	84	83	82	81	80	79

	Muggy (%)	Oppressive (%)
1	6	94
2	6	94
3	6	94
4	6	94
5	6	94
6	6	94
7	6	94
8	6	94
9	7	93
10	7	93
11	7	93
12	8	92
13	9	91
14	9	91
15	10	90
16	10	90
17	11	89
18	12	88
19	12	88
20	13	87
21	13	87
22	13	87
23	14	86
24	15	85
25	16	84
26	17	83
27	18	82
28	19	81
29	20	80
30	21	79

Wind in September

Winds average 4 km/h in September.

Across September, daily wind ranges from about 4 km/h on the calmest days to 4 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
Wind speed (km/h)	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
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

	Wind speed (km/h)	Feels
1	4	calm
2	4	calm
3	4	calm
4	4	calm
5	4	calm
6	4	calm
7	4	calm
8	4	calm
9	4	calm
10	4	calm
11	4	calm
12	4	calm
13	4	calm
14	4	calm
15	4	calm
16	4	calm
17	4	calm
18	4	calm
19	4	calm
20	4	calm
21	4	calm
22	4	calm
23	4	calm
24	4	calm
25	4	calm
26	4	calm
27	4	calm
28	4	calm
29	4	calm
30	4	calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 18 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over September. Sunrise moves from 5:44 AM to 5:48 AM, and sunset from 6:04 PM to 5:40 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
Daylight (h)	12.3	12.3	12.3	12.3	12.3	12.3	12.2	12.2	12.2	12.2	12.2	12.2	12.1	12.1	12.1	12.1	12.1	12.1	12.0	12.0	12.0	12.0	12.0	12.0	11.9	11.9	11.9	11.9	11.9	11.9
Sunrise (AM)	5:44	5:44	5:45	5:45	5:45	5:45	5:45	5:45	5:45	5:45	5:46	5:46	5:46	5:46	5:46	5:46	5:46	5:46	5:46	5:47	5:47	5:47	5:47	5:47	5:47	5:47	5:47	5:48	5:48	5:48
Sunset (PM)	6:04	6:03	6:03	6:02	6:01	6:00	5:59	5:58	5:58	5:57	5:56	5:55	5:54	5:53	5:53	5:52	5:51	5:50	5:49	5:48	5:47	5:47	5:46	5:45	5:44	5:43	5:42	5:42	5:41	5:40

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.3	5:44	6:04
2	12.3	5:44	6:03
3	12.3	5:45	6:03
4	12.3	5:45	6:02
5	12.3	5:45	6:01
6	12.3	5:45	6:00
7	12.2	5:45	5:59
8	12.2	5:45	5:58
9	12.2	5:45	5:58
10	12.2	5:45	5:57
11	12.2	5:46	5:56
12	12.2	5:46	5:55
13	12.1	5:46	5:54
14	12.1	5:46	5:53
15	12.1	5:46	5:53
16	12.1	5:46	5:52
17	12.1	5:46	5:51
18	12.1	5:46	5:50
19	12.0	5:46	5:49
20	12.0	5:47	5:48
21	12.0	5:47	5:47
22	12.0	5:47	5:47
23	12.0	5:47	5:46
24	12.0	5:47	5:45
25	11.9	5:47	5:44
26	11.9	5:47	5:43
27	11.9	5:47	5:42
28	11.9	5:48	5:42
29	11.9	5:48	5:41
30	11.9	5:48	5:40

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.65 kWh/m².

For context, solar energy here swings from a low near 2.89 kWh/m² to a high of 5.81 kWh/m² in April across the year — September's 4.65 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
Solar energy (kWh/m²)	4.8	4.8	4.8	4.8	4.8	4.8	4.7	4.7	4.7	4.7	4.7	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.5	4.5	4.5	4.5	4.5	4.5	4.5	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

	Solar energy (kWh/m²)	Level
1	4.8	Bright
2	4.8	Bright
3	4.8	Bright
4	4.8	Bright
5	4.8	Bright
6	4.8	Bright
7	4.7	Bright
8	4.7	Bright
9	4.7	Bright
10	4.7	Bright
11	4.7	Bright
12	4.6	Bright
13	4.6	Bright
14	4.6	Bright
15	4.6	Bright
16	4.6	Bright
17	4.6	Bright
18	4.6	Bright
19	4.6	Bright
20	4.5	Bright
21	4.5	Bright
22	4.5	Bright
23	4.5	Bright
24	4.5	Bright
25	4.5	Bright
26	4.5	Bright
27	4.5	Bright
28	4.5	Bright
29	4.5	Bright
30	4.5	Bright

Planning a trip in September

Is September a good time to visit Diadi?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

3.3

Sightseeing

10th-best month of the year

4.3

Beach & pool

11th-best month of the year

September is a weaker month for outdoor sightseeing in Diadi.

What to pack for Diadi in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Diadi sees daytime highs around 29°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 25 days see rain.

light clothesrain gearsun protection

UV index in Diadi in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Diadi peaks around August 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 8 (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	12	13	13	13	13	13	14	13	11	9	8
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	12	Extreme
Mar	13	Extreme
Apr	13	Extreme
May	13	Extreme
Jun	13	Extreme
Jul	13	Extreme
Aug	14	Extreme
Sep	13	Extreme
Oct	11	Extreme
Nov	9	Very high
Dec	8	Very high

Air quality in Diadi in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Diadi is worst in April — around 17 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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	15	17	14	13	13	15	14	13	12	11
Level	Good	Good	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Good	Good

	PM2.5 (µg/m³)	Level
Jan	12	Good
Feb	12	Good
Mar	15	Moderate
Apr	17	Moderate
May	14	Moderate
Jun	13	Moderate
Jul	13	Moderate
Aug	15	Moderate
Sep	14	Moderate
Oct	13	Moderate
Nov	12	Good
Dec	11	Good

Location & terrain

Where is Diadi?

Diadi sits at 16.7°N, 121.4°E, 276 m above sea level, in Philippines. The nearest listed city is Ramon, 20 km away.

Topography around Diadi

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Diadi.

Within 3 km, the terrain around Diadi has significant variations in elevation — a maximum elevation change of 268 m around an average of 276 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 829 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,878 m.

The land around Diadi is covered by trees (62%) and cropland (24%) within 3 km, trees (47%) and grassland (31%) within 16 km, and trees (71%) within 80 km.

3 km

268 m

trees 62%

16 km

829 m

trees 47%

80 km

2,878 m

trees 71%

treesgrasslandcroplandwater

← August Diadi year-round climate October →Best places to visit in September

September weather nearby: Ramon 20 km · Santiago 21 km · Lagawe 27 km · Solano 30 km · San Mateo 30 km · Baggabag B 30 km · Bayombong 35 km · Alicia 37 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 Diadi (16.7262°, 121.3589°, elevation 276 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. 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).

	Avg high (°C)	Avg low (°C)
1	30	22
2	30	22
3	30	22
4	30	22
5	29	22
6	29	22
7	29	22
8	29	22
9	29	22
10	29	22
11	29	22
12	29	22
13	29	22
14	29	22
15	29	22
16	29	22
17	29	22
18	29	22
19	29	22
20	29	22
21	29	22
22	29	22
23	29	22
24	29	22
25	29	22
26	29	22
27	29	22
28	29	22
29	29	22
30	29	22

	Clearer (%)	Cloudier (%)
1	13	87
2	14	86
3	14	86
4	14	86
5	14	86
6	14	86
7	14	86
8	14	86
9	14	86
10	14	86
11	15	85
12	15	85
13	15	85
14	15	85
15	15	85
16	15	85
17	16	84
18	16	84
19	16	84
20	17	83
21	17	83
22	19	81
23	19	81
24	19	81
25	21	79
26	21	79
27	21	79
28	23	77
29	23	77
30	24	76

	Rain chance (%)
1	86
2	86
3	86
4	86
5	86
6	86
7	87
8	87
9	87
10	87
11	86
12	86
13	86
14	85
15	85
16	84
17	84
18	84
19	83
20	83
21	82
22	82
23	81
24	81
25	80
26	79
27	79
28	78
29	77
30	77

	Muggy (%)	Oppressive (%)
1	6	94
2	6	94
3	6	94
4	6	94
5	6	94
6	6	94
7	6	94
8	6	94
9	7	93
10	7	93
11	7	93
12	8	92
13	9	91
14	9	91
15	10	90
16	10	90
17	11	89
18	12	88
19	12	88
20	13	87
21	13	87
22	13	87
23	14	86
24	15	85
25	16	84
26	17	83
27	18	82
28	19	81
29	20	80
30	21	79

	Avg high (°C)	Avg low (°C)
1	30	22
2	30	22
3	30	22
4	30	22
5	29	22
6	29	22
7	29	22
8	29	22
9	29	22
10	29	22
11	29	22
12	29	22
13	29	22
14	29	22
15	29	22
16	29	22
17	29	22
18	29	22
19	29	22
20	29	22
21	29	22
22	29	22
23	29	22
24	29	22
25	29	22
26	29	22
27	29	22
28	29	22
29	29	22
30	29	22

	Clearer (%)	Cloudier (%)
1	13	87
2	14	86
3	14	86
4	14	86
5	14	86
6	14	86
7	14	86
8	14	86
9	14	86
10	14	86
11	15	85
12	15	85
13	15	85
14	15	85
15	15	85
16	15	85
17	16	84
18	16	84
19	16	84
20	17	83
21	17	83
22	19	81
23	19	81
24	19	81
25	21	79
26	21	79
27	21	79
28	23	77
29	23	77
30	24	76

	Rain chance (%)
1	86
2	86
3	86
4	86
5	86
6	86
7	87
8	87
9	87
10	87
11	86
12	86
13	86
14	85
15	85
16	84
17	84
18	84
19	83
20	83
21	82
22	82
23	81
24	81
25	80
26	79
27	79
28	78
29	77
30	77

	Muggy (%)	Oppressive (%)
1	6	94
2	6	94
3	6	94
4	6	94
5	6	94
6	6	94
7	6	94
8	6	94
9	7	93
10	7	93
11	7	93
12	8	92
13	9	91
14	9	91
15	10	90
16	10	90
17	11	89
18	12	88
19	12	88
20	13	87
21	13	87
22	13	87
23	14	86
24	15	85
25	16	84
26	17	83
27	18	82
28	19	81
29	20	80
30	21	79

	Avg high (°C)	Avg low (°C)
1	30	22
2	30	22
3	30	22
4	30	22
5	29	22
6	29	22
7	29	22
8	29	22
9	29	22
10	29	22
11	29	22
12	29	22
13	29	22
14	29	22
15	29	22
16	29	22
17	29	22
18	29	22
19	29	22
20	29	22
21	29	22
22	29	22
23	29	22
24	29	22
25	29	22
26	29	22
27	29	22
28	29	22
29	29	22
30	29	22

	Clearer (%)	Cloudier (%)
1	13	87
2	14	86
3	14	86
4	14	86
5	14	86
6	14	86
7	14	86
8	14	86
9	14	86
10	14	86
11	15	85
12	15	85
13	15	85
14	15	85
15	15	85
16	15	85
17	16	84
18	16	84
19	16	84
20	17	83
21	17	83
22	19	81
23	19	81
24	19	81
25	21	79
26	21	79
27	21	79
28	23	77
29	23	77
30	24	76

	Rain chance (%)
1	86
2	86
3	86
4	86
5	86
6	86
7	87
8	87
9	87
10	87
11	86
12	86
13	86
14	85
15	85
16	84
17	84
18	84
19	83
20	83
21	82
22	82
23	81
24	81
25	80
26	79
27	79
28	78
29	77
30	77

	Muggy (%)	Oppressive (%)
1	6	94
2	6	94
3	6	94
4	6	94
5	6	94
6	6	94
7	6	94
8	6	94
9	7	93
10	7	93
11	7	93
12	8	92
13	9	91
14	9	91
15	10	90
16	10	90
17	11	89
18	12	88
19	12	88
20	13	87
21	13	87
22	13	87
23	14	86
24	15	85
25	16	84
26	17	83
27	18	82
28	19	81
29	20	80
30	21	79