Tarija weather in September

In September, Tarija sees average daytime highs of 20°C and overnight lows near 6°C, with 34 mm of precipitation across 8.4 wet days and about 11.9 hours of daylight. It is the 4th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 20°C through the month. The sky is clear or mostly clear about 43% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 36 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Tarija's 4th-clearest and 1st-windiest month. For the whole year in context, see Tarija's year-round climate.

Daytime high: 20°; 4th warmest
Overnight low: 6°; 5th coldest
Precipitation: 34 mm; 8.4 wet days
Daylight: 11 h 54 min; 6:17 AM – 6:10 PM
Cloud cover: 48%; 4th clearest
Wind: 8 km/h; 1st windiest
Solar energy: 6.11 kWh/m²
Travel score: 6.7; out of 10

Tarija is city of Bolivia.

Founded: 1574

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

← August Tarija 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 20°C through the month.

A typical September day in Tarija reaches about 20°C in the afternoon and slips back to 6°C overnight — a 14°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 26°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)	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	21	21
Avg low (°C)	5	5	5	5	5	5	5	5	6	6	6	6	6	6	6	6	6	6	6	6	6	6	7	7	7	7	7	7	7	7

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

How September really feels in Tarija

Once humidity and wind are folded in, September 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.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Tarija weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 8th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	20° / 11°	220	24.9	13.2	4.0
Feb	20° / 11°	190	21.8	12.7	4.1
Mar	20° / 10°	163	21.8	12.2	4.5
Apr	19° / 9°	72	13.8	11.5	5.5
May	19° / 6°	24	6.9	11	6.6
Jun	19° / 3°	9	3.2	10.7	7.3
Jul	18° / 2°	9	2.7	10.8	7.4
Aug	19° / 4°	15	4.5	11.3	7.4
Sep	20° / 6°	34	8.4	11.9	6.7
Oct	21° / 9°	86	17.3	12.5	5.3
Nov	20° / 10°	130	20.5	13	4.6
Dec	21° / 11°	194	24.5	13.3	4.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 38%. 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 (%)	73	73	73	71	70	69	68	68	66	66	65	65	63	63	62	62	61	60	59	59	58	57	56	55	54	52	52	50	49	47
Cloudier (%)	27	27	27	29	30	31	32	32	34	34	35	35	37	37	38	38	39	40	41	41	42	43	44	45	46	48	48	50	51	53

	Clearer (%)	Cloudier (%)
1	73	27
2	73	27
3	73	27
4	71	29
5	70	30
6	69	31
7	68	32
8	68	32
9	66	34
10	66	34
11	65	35
12	65	35
13	63	37
14	63	37
15	62	38
16	62	38
17	61	39
18	60	40
19	59	41
20	59	41
21	58	42
22	57	43
23	56	44
24	55	45
25	54	46
26	52	48
27	52	48
28	50	50
29	49	51
30	47	53

Chance of precipitation in September

Any precipitation

Tarija gets around 34 mm of rain and snow over 8.4 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 29% and peaks near 44% on the wettest days, and about 0 day brings snow. 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 (%)	17	17	18	18	19	20	21	21	22	23	23	24	25	26	27	28	29	30	31	32	33	34	35	37	38	39	41	42	43	44

	Rain chance (%)
1	17
2	17
3	18
4	18
5	19
6	20
7	21
8	21
9	22
10	23
11	23
12	24
13	25
14	26
15	27
16	28
17	29
18	30
19	31
20	32
21	33
22	34
23	35
24	37
25	38
26	39
27	41
28	42
29	43
30	44

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 100% 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 (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

Wind in September

Winds average 8 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 8 km/h on the calmest days to 8 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)	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8
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	8	calm
2	8	calm
3	8	calm
4	8	calm
5	8	calm
6	8	calm
7	8	calm
8	8	calm
9	8	calm
10	8	calm
11	8	calm
12	8	calm
13	8	calm
14	8	calm
15	8	calm
16	8	calm
17	8	calm
18	8	calm
19	8	calm
20	8	calm
21	8	calm
22	8	calm
23	8	calm
24	8	calm
25	8	calm
26	8	calm
27	8	calm
28	8	calm
29	8	calm
30	8	calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 36 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over September. Sunrise moves from 6:32 AM to 6:03 AM, and sunset from 6:06 PM to 6:13 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)	11.6	11.6	11.6	11.6	11.6	11.7	11.7	11.7	11.7	11.8	11.8	11.8	11.8	11.8	11.9	11.9	11.9	11.9	11.9	12.0	12.0	12.0	12.0	12.0	12.1	12.1	12.1	12.1	12.2	12.2
Sunrise (AM)	6:32	6:31	6:30	6:29	6:28	6:27	6:26	6:25	6:24	6:23	6:22	6:21	6:20	6:19	6:18	6:17	6:16	6:15	6:14	6:13	6:12	6:11	6:10	6:09	6:08	6:07	6:06	6:05	6:04	6:03
Sunset (PM)	6:06	6:06	6:06	6:06	6:07	6:07	6:07	6:07	6:08	6:08	6:08	6:09	6:09	6:09	6:09	6:10	6:10	6:10	6:10	6:11	6:11	6:11	6:11	6:12	6:12	6:12	6:13	6:13	6:13	6:13

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.6	6:32	6:06
2	11.6	6:31	6:06
3	11.6	6:30	6:06
4	11.6	6:29	6:06
5	11.6	6:28	6:07
6	11.7	6:27	6:07
7	11.7	6:26	6:07
8	11.7	6:25	6:07
9	11.7	6:24	6:08
10	11.8	6:23	6:08
11	11.8	6:22	6:08
12	11.8	6:21	6:09
13	11.8	6:20	6:09
14	11.8	6:19	6:09
15	11.9	6:18	6:09
16	11.9	6:17	6:10
17	11.9	6:16	6:10
18	11.9	6:15	6:10
19	11.9	6:14	6:10
20	12.0	6:13	6:11
21	12.0	6:12	6:11
22	12.0	6:11	6:11
23	12.0	6:10	6:11
24	12.0	6:09	6:12
25	12.1	6:08	6:12
26	12.1	6:07	6:12
27	12.1	6:06	6:13
28	12.1	6:05	6:13
29	12.2	6:04	6:13
30	12.2	6:03	6:13

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.11 kWh/m².

For context, solar energy here swings from a low near 4.54 kWh/m² to a high of 6.24 kWh/m² in October across the year — September's 6.11 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)	5.9	5.9	6.0	6.0	6.0	6.0	6.0	6.0	6.0	6.0	6.0	6.1	6.1	6.1	6.1	6.1	6.1	6.1	6.1	6.2	6.2	6.2	6.2	6.2	6.2	6.2	6.2	6.2	6.2	6.2
Level	Bright	Bright	Bright	Bright	Bright	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense

	Solar energy (kWh/m²)	Level
1	5.9	Bright
2	5.9	Bright
3	6.0	Bright
4	6.0	Bright
5	6.0	Bright
6	6.0	Intense
7	6.0	Intense
8	6.0	Intense
9	6.0	Intense
10	6.0	Intense
11	6.0	Intense
12	6.1	Intense
13	6.1	Intense
14	6.1	Intense
15	6.1	Intense
16	6.1	Intense
17	6.1	Intense
18	6.1	Intense
19	6.1	Intense
20	6.2	Intense
21	6.2	Intense
22	6.2	Intense
23	6.2	Intense
24	6.2	Intense
25	6.2	Intense
26	6.2	Intense
27	6.2	Intense
28	6.2	Intense
29	6.2	Intense
30	6.2	Intense

Planning a trip in September

Hazard calendar for Tarija

In seasonPeak

None of Tarija's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Tarija's monsoon runs November–March, when most of the year's rain falls.

Monsoon

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is September a good time to visit Tarija?

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

6.7

Sightseeing

4th-best month of the year

3.6

Beach & pool

1st-best month of the year

September is a reasonable time to visit Tarija for sightseeing.

What to pack for Tarija in September

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

In September, Tarija sees daytime highs around 20°C and nights near 6°C. Pack sun protection. Worth having: a warm layer and rain gear. About 8 days see rain.

sun protectiona warm layerrain gear

UV index in Tarija in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tarija peaks around January 18 at about 17 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 7 (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)	17	17	15	12	9	7	7	10	12	15	15	17
Level	Extreme	Extreme	Extreme	Extreme	Very high	Very high	High	Extreme	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	17	Extreme
Feb	17	Extreme
Mar	15	Extreme
Apr	12	Extreme
May	9	Very high
Jun	7	Very high
Jul	7	High
Aug	10	Extreme
Sep	12	Extreme
Oct	15	Extreme
Nov	15	Extreme
Dec	17	Extreme

Location & terrain

Where is Tarija?

Tarija sits at 21.5°S, 64.7°W, 1,870 m above sea level, in Bolivia. The nearest listed city is Tupiza, 103 km away.

Topography around Tarija

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

Within 3 km, the terrain around Tarija has only modest variations in elevation — a maximum elevation change of 108 m around an average of 1,886 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,129 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,049 m.

The land around Tarija is covered by artificial surfaces (60%) within 3 km, grassland (56%) within 16 km, and grassland (49%) and trees (33%) within 80 km.

3 km

108 m

artificial surfaces 60%

16 km

2,129 m

grassland 56%

80 km

4,049 m

grassland 49%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwater

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

September weather nearby: Tupiza 103 km · Villazón 108 km · Yacuiba 121 km · Profesor Salvador Mazza 122 km · Villamontes 134 km · Bermejo 139 km · Tartagal 145 km · General Mosconi 151 km

Bolivia travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type A / B / C; 230 V · 50 Hz
Prices: ≈ 40% of US; price level, 2025
GDP per capita: $5,148; 2025
Happiness: 5.8 / 10; World Happiness, 2025
Homicide rate: 4.4; per 100k, 2023
Road deaths: 21.1; per 100k/yr, 2019
Income group: Lower middle; World Bank
English: Moderate; EF EPI 521
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 Tarija (-21.5355°, -64.7296°, elevation 1,870 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. 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	20	5
2	20	5
3	20	5
4	20	5
5	20	5
6	20	5
7	20	5
8	20	5
9	20	6
10	20	6
11	20	6
12	20	6
13	20	6
14	20	6
15	20	6
16	20	6
17	20	6
18	20	6
19	20	6
20	20	6
21	20	6
22	20	6
23	20	7
24	20	7
25	20	7
26	20	7
27	20	7
28	20	7
29	21	7
30	21	7

	Clearer (%)	Cloudier (%)
1	73	27
2	73	27
3	73	27
4	71	29
5	70	30
6	69	31
7	68	32
8	68	32
9	66	34
10	66	34
11	65	35
12	65	35
13	63	37
14	63	37
15	62	38
16	62	38
17	61	39
18	60	40
19	59	41
20	59	41
21	58	42
22	57	43
23	56	44
24	55	45
25	54	46
26	52	48
27	52	48
28	50	50
29	49	51
30	47	53

	Rain chance (%)
1	17
2	17
3	18
4	18
5	19
6	20
7	21
8	21
9	22
10	23
11	23
12	24
13	25
14	26
15	27
16	28
17	29
18	30
19	31
20	32
21	33
22	34
23	35
24	37
25	38
26	39
27	41
28	42
29	43
30	44

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

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

	Clearer (%)	Cloudier (%)
1	73	27
2	73	27
3	73	27
4	71	29
5	70	30
6	69	31
7	68	32
8	68	32
9	66	34
10	66	34
11	65	35
12	65	35
13	63	37
14	63	37
15	62	38
16	62	38
17	61	39
18	60	40
19	59	41
20	59	41
21	58	42
22	57	43
23	56	44
24	55	45
25	54	46
26	52	48
27	52	48
28	50	50
29	49	51
30	47	53

	Rain chance (%)
1	17
2	17
3	18
4	18
5	19
6	20
7	21
8	21
9	22
10	23
11	23
12	24
13	25
14	26
15	27
16	28
17	29
18	30
19	31
20	32
21	33
22	34
23	35
24	37
25	38
26	39
27	41
28	42
29	43
30	44

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

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

	Clearer (%)	Cloudier (%)
1	73	27
2	73	27
3	73	27
4	71	29
5	70	30
6	69	31
7	68	32
8	68	32
9	66	34
10	66	34
11	65	35
12	65	35
13	63	37
14	63	37
15	62	38
16	62	38
17	61	39
18	60	40
19	59	41
20	59	41
21	58	42
22	57	43
23	56	44
24	55	45
25	54	46
26	52	48
27	52	48
28	50	50
29	49	51
30	47	53

	Rain chance (%)
1	17
2	17
3	18
4	18
5	19
6	20
7	21
8	21
9	22
10	23
11	23
12	24
13	25
14	26
15	27
16	28
17	29
18	30
19	31
20	32
21	33
22	34
23	35
24	37
25	38
26	39
27	41
28	42
29	43
30	44

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100