Rioja weather in September

In September, Rioja sees average daytime highs of 26°C and overnight lows near 15°C, with 55 mm of rain across 14.3 wet days and about 12 hours of daylight. It is the 1st-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 17% of the time in September, and the air most often feels comfortable.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Rioja's 4th-clearest and 5th-windiest month. For the whole year in context, see Rioja's year-round climate.

Daytime high: 26°; 1st warmest
Overnight low: 15°; 4th coldest
Rainfall: 55 mm; 14.3 wet days
Daylight: 12 hours; 6:04 AM – 6:02 PM
Cloud cover: 65%; 4th clearest
Wind: 4 km/h; 5th windiest
Solar energy: 5.63 kWh/m²
Travel score: 5.9; out of 10

Rioja is town in San Martín, Peru.

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

← August Rioja 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 26°C through the month.

A typical September day in Rioja reaches about 26°C in the afternoon and slips back to 15°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 28°C. Set against its neighbours, September runs about 1°C warmer than August and on par with 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)	25	25	25	25	25	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 low (°C)	14	14	14	14	14	14	14	14	14	14	14	14	14	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15

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

Rioja weather by month

How September compares with the rest of the year at a glance. September is the 1st-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	24° / 16°	148	22.8	12.3	4.7
Feb	24° / 16°	153	22.5	12.2	4.4
Mar	24° / 16°	197	25.8	12	4.2
Apr	25° / 16°	159	25.3	11.9	4.2
May	24° / 15°	114	24	11.7	4.7
Jun	24° / 14°	70	17.7	11.7	5.8
Jul	24° / 14°	54	14.4	11.7	6.4
Aug	25° / 14°	42	12.2	11.8	6.7
Sep	26° / 15°	55	14.3	12	5.9
Oct	25° / 15°	117	20.9	12.1	4.9
Nov	25° / 16°	166	24.9	12.3	4.3
Dec	24° / 16°	152	24.7	12.3	4.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 23% of September, with mostly cloudy or overcast conditions the remaining 59%. Skies tend to cloud over 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
Clearer (%)	51	51	51	50	49	49	48	48	48	46	45	44	43	43	41	40	39	38	36	36	35	34	33	32	32	32	31	31	31	30
Cloudier (%)	49	49	49	50	51	51	52	52	52	54	55	56	57	57	59	60	61	62	64	64	65	66	67	68	68	68	69	69	69	70

	Clearer (%)	Cloudier (%)
1	51	49
2	51	49
3	51	49
4	50	50
5	49	51
6	49	51
7	48	52
8	48	52
9	48	52
10	46	54
11	45	55
12	44	56
13	43	57
14	43	57
15	41	59
16	40	60
17	39	61
18	38	62
19	36	64
20	36	64
21	35	65
22	34	66
23	33	67
24	32	68
25	32	68
26	32	68
27	31	69
28	31	69
29	31	69
30	30	70

Chance of precipitation in September

Any precipitation

Rioja gets around 55 mm of rain over 14.3 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 48% and peaks near 55% on the wettest days. The odds climb 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 (%)	42	42	42	42	42	42	42	43	43	44	45	45	46	47	47	48	48	49	50	50	51	52	52	52	53	53	53	54	55	55

	Rain chance (%)
1	42
2	42
3	42
4	42
5	42
6	42
7	42
8	43
9	43
10	44
11	45
12	45
13	46
14	47
15	47
16	48
17	48
18	49
19	50
20	50
21	51
22	52
23	52
24	52
25	53
26	53
27	53
28	54
29	55
30	55

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the comfortable band about 86% of days. It rarely turns muggy — the humid and sticky bands barely register.

	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
Dry (%)	5	5	4	4	4	4	4	4	4	3	3	3	3	3	3	3	3	3	2	2	2	2	2	1	1	1	1	1	1	1
Comfortable (%)	89	89	90	90	90	90	90	89	89	90	90	89	89	88	88	87	86	85	85	85	84	83	82	83	82	81	80	78	77	76
Humid (%)	6	6	6	6	6	6	6	7	7	7	7	8	8	9	9	10	11	12	13	13	14	15	16	16	17	18	19	21	22	23

	Dry (%)	Comfortable (%)	Humid (%)
1	5	89	6
2	5	89	6
3	4	90	6
4	4	90	6
5	4	90	6
6	4	90	6
7	4	90	6
8	4	89	7
9	4	89	7
10	3	90	7
11	3	90	7
12	3	89	8
13	3	89	8
14	3	88	9
15	3	88	9
16	3	87	10
17	3	86	11
18	3	85	12
19	2	85	13
20	2	85	13
21	2	84	14
22	2	83	15
23	2	82	16
24	1	83	16
25	1	82	17
26	1	81	18
27	1	80	19
28	1	78	21
29	1	77	22
30	1	76	23

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

Days grow by about 6 minutes over September. Sunrise moves from 6:12 AM to 5:57 AM, and sunset from 6:05 PM to 5:59 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)	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0
Sunrise (AM)	6:12	6:11	6:11	6:10	6:10	6:09	6:09	6:08	6:08	6:07	6:07	6:06	6:06	6:05	6:05	6:04	6:03	6:03	6:02	6:02	6:01	6:01	6:00	6:00	5:59	5:59	5:58	5:58	5:57	5:57
Sunset (PM)	6:05	6:05	6:05	6:04	6:04	6:04	6:04	6:04	6:03	6:03	6:03	6:03	6:03	6:02	6:02	6:02	6:02	6:02	6:01	6:01	6:01	6:01	6:01	6:00	6:00	6:00	6:00	6:00	6:00	5:59

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.9	6:12	6:05
2	11.9	6:11	6:05
3	11.9	6:11	6:05
4	11.9	6:10	6:04
5	11.9	6:10	6:04
6	11.9	6:09	6:04
7	11.9	6:09	6:04
8	11.9	6:08	6:04
9	11.9	6:08	6:03
10	11.9	6:07	6:03
11	11.9	6:07	6:03
12	11.9	6:06	6:03
13	12.0	6:06	6:03
14	12.0	6:05	6:02
15	12.0	6:05	6:02
16	12.0	6:04	6:02
17	12.0	6:03	6:02
18	12.0	6:03	6:02
19	12.0	6:02	6:01
20	12.0	6:02	6:01
21	12.0	6:01	6:01
22	12.0	6:01	6:01
23	12.0	6:00	6:01
24	12.0	6:00	6:00
25	12.0	5:59	6:00
26	12.0	5:59	6:00
27	12.0	5:58	6:00
28	12.0	5:58	6:00
29	12.0	5:57	6:00
30	12.0	5:57	5:59

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.63 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.6 kWh/m² to a high of 5.63 kWh/m² in September across the year — September's 5.63 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
Solar energy (kWh/m²)	5.5	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7
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	5.5	Bright
2	5.6	Bright
3	5.6	Bright
4	5.6	Bright
5	5.6	Bright
6	5.6	Bright
7	5.6	Bright
8	5.6	Bright
9	5.6	Bright
10	5.6	Bright
11	5.6	Bright
12	5.6	Bright
13	5.7	Bright
14	5.7	Bright
15	5.7	Bright
16	5.7	Bright
17	5.7	Bright
18	5.7	Bright
19	5.7	Bright
20	5.7	Bright
21	5.7	Bright
22	5.7	Bright
23	5.7	Bright
24	5.7	Bright
25	5.7	Bright
26	5.7	Bright
27	5.7	Bright
28	5.7	Bright
29	5.7	Bright
30	5.7	Bright

Planning a trip in September

Is September a good time to visit Rioja?

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

5.9

Sightseeing

3rd-best month of the year

5.6

Beach & pool

2nd-best month of the year

September is a reasonable time to visit Rioja for sightseeing.

What to pack for Rioja in September

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

In September, Rioja sees daytime highs around 26°C and nights near 15°C. Pack rain gear. Worth having: light clothes and sun protection. About 14 days see rain.

rain gearlight clothessun protection

UV index in Rioja 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 Rioja peaks around February 13 at about 17 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 20 at about 11 (extreme).

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)	16	17	16	14	13	11	11	11	13	14	13	14
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	16	Extreme
Feb	17	Extreme
Mar	16	Extreme
Apr	14	Extreme
May	13	Extreme
Jun	11	Extreme
Jul	11	Extreme
Aug	11	Extreme
Sep	13	Extreme
Oct	14	Extreme
Nov	13	Extreme
Dec	14	Extreme

Air quality in Rioja 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 Rioja is worst in September — around 20 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (June, 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)	11	14	12	10	8	8	9	16	20	10	11	10
Level	Good	Moderate	Moderate	Good	Good	Good	Good	Moderate	Moderate	Good	Good	Good

	PM2.5 (µg/m³)	Level
Jan	11	Good
Feb	14	Moderate
Mar	12	Moderate
Apr	10	Good
May	8	Good
Jun	8	Good
Jul	9	Good
Aug	16	Moderate
Sep	20	Moderate
Oct	10	Good
Nov	11	Good
Dec	10	Good

Location & terrain

Where is Rioja?

Rioja sits at 6.1°S, 77.2°W, 831 m above sea level, in Peru. The nearest listed city is Moyobamba, 21 km away.

Topography around Rioja

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

Within 3 km, the terrain around Rioja has only modest variations in elevation — a maximum elevation change of 57 m around an average of 829 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,549 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,807 m.

The land around Rioja is covered by trees (34%), grassland (28%) and cropland (24%) within 3 km, trees (64%) and grassland (22%) within 16 km, and trees (89%) within 80 km.

3 km

57 m

trees 34%

16 km

1,549 m

trees 64%

80 km

3,807 m

trees 89%

treesgrasslandcroplandartificial surfaceswater

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

September weather nearby: Moyobamba 21 km · Chachapoyas 80 km · La Banda 103 km · Yurimaguas 117 km · Bellavista 128 km · Juanjuí 134 km · Bagua Grande 145 km · La Peca 149 km

Peru travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type A / B / C; 220 V · 60 Hz
Prices: ≈ 51% of US; price level, 2025
GDP per capita: $9,684; 2025
Happiness: 6.0 / 10; World Happiness, 2025
Safe drinking water: 49%; of population, 2024
Homicide rate: 8.6; per 100k, 2021
Road deaths: 13.6; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Moderate; EF EPI 519
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 Rioja (-6.0568°, -77.1665°, elevation 831 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	25	14
2	25	14
3	25	14
4	25	14
5	25	14
6	26	14
7	26	14
8	26	14
9	26	14
10	26	14
11	26	14
12	26	14
13	26	14
14	26	15
15	26	15
16	26	15
17	26	15
18	26	15
19	26	15
20	26	15
21	26	15
22	26	15
23	26	15
24	26	15
25	26	15
26	26	15
27	26	15
28	26	15
29	26	15
30	26	15

	Clearer (%)	Cloudier (%)
1	51	49
2	51	49
3	51	49
4	50	50
5	49	51
6	49	51
7	48	52
8	48	52
9	48	52
10	46	54
11	45	55
12	44	56
13	43	57
14	43	57
15	41	59
16	40	60
17	39	61
18	38	62
19	36	64
20	36	64
21	35	65
22	34	66
23	33	67
24	32	68
25	32	68
26	32	68
27	31	69
28	31	69
29	31	69
30	30	70

	Rain chance (%)
1	42
2	42
3	42
4	42
5	42
6	42
7	42
8	43
9	43
10	44
11	45
12	45
13	46
14	47
15	47
16	48
17	48
18	49
19	50
20	50
21	51
22	52
23	52
24	52
25	53
26	53
27	53
28	54
29	55
30	55

	Dry (%)	Comfortable (%)	Humid (%)
1	5	89	6
2	5	89	6
3	4	90	6
4	4	90	6
5	4	90	6
6	4	90	6
7	4	90	6
8	4	89	7
9	4	89	7
10	3	90	7
11	3	90	7
12	3	89	8
13	3	89	8
14	3	88	9
15	3	88	9
16	3	87	10
17	3	86	11
18	3	85	12
19	2	85	13
20	2	85	13
21	2	84	14
22	2	83	15
23	2	82	16
24	1	83	16
25	1	82	17
26	1	81	18
27	1	80	19
28	1	78	21
29	1	77	22
30	1	76	23

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

	Clearer (%)	Cloudier (%)
1	51	49
2	51	49
3	51	49
4	50	50
5	49	51
6	49	51
7	48	52
8	48	52
9	48	52
10	46	54
11	45	55
12	44	56
13	43	57
14	43	57
15	41	59
16	40	60
17	39	61
18	38	62
19	36	64
20	36	64
21	35	65
22	34	66
23	33	67
24	32	68
25	32	68
26	32	68
27	31	69
28	31	69
29	31	69
30	30	70

	Rain chance (%)
1	42
2	42
3	42
4	42
5	42
6	42
7	42
8	43
9	43
10	44
11	45
12	45
13	46
14	47
15	47
16	48
17	48
18	49
19	50
20	50
21	51
22	52
23	52
24	52
25	53
26	53
27	53
28	54
29	55
30	55

	Dry (%)	Comfortable (%)	Humid (%)
1	5	89	6
2	5	89	6
3	4	90	6
4	4	90	6
5	4	90	6
6	4	90	6
7	4	90	6
8	4	89	7
9	4	89	7
10	3	90	7
11	3	90	7
12	3	89	8
13	3	89	8
14	3	88	9
15	3	88	9
16	3	87	10
17	3	86	11
18	3	85	12
19	2	85	13
20	2	85	13
21	2	84	14
22	2	83	15
23	2	82	16
24	1	83	16
25	1	82	17
26	1	81	18
27	1	80	19
28	1	78	21
29	1	77	22
30	1	76	23

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

	Clearer (%)	Cloudier (%)
1	51	49
2	51	49
3	51	49
4	50	50
5	49	51
6	49	51
7	48	52
8	48	52
9	48	52
10	46	54
11	45	55
12	44	56
13	43	57
14	43	57
15	41	59
16	40	60
17	39	61
18	38	62
19	36	64
20	36	64
21	35	65
22	34	66
23	33	67
24	32	68
25	32	68
26	32	68
27	31	69
28	31	69
29	31	69
30	30	70

	Rain chance (%)
1	42
2	42
3	42
4	42
5	42
6	42
7	42
8	43
9	43
10	44
11	45
12	45
13	46
14	47
15	47
16	48
17	48
18	49
19	50
20	50
21	51
22	52
23	52
24	52
25	53
26	53
27	53
28	54
29	55
30	55

	Dry (%)	Comfortable (%)	Humid (%)
1	5	89	6
2	5	89	6
3	4	90	6
4	4	90	6
5	4	90	6
6	4	90	6
7	4	90	6
8	4	89	7
9	4	89	7
10	3	90	7
11	3	90	7
12	3	89	8
13	3	89	8
14	3	88	9
15	3	88	9
16	3	87	10
17	3	86	11
18	3	85	12
19	2	85	13
20	2	85	13
21	2	84	14
22	2	83	15
23	2	82	16
24	1	83	16
25	1	82	17
26	1	81	18
27	1	80	19
28	1	78	21
29	1	77	22
30	1	76	23