Say weather in December

In December, Say sees average daytime highs of 33°C and overnight lows near 18°C, with 0 mm of rain across 0 wet days and about 11.2 hours of daylight. It is the 10th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 34°C in the first days to 31°C by the end. The sky is clear or mostly clear about 70% of the time in December, and the air most often feels dry.

Daylight stretches from about 11 h 18 min at the start of December to 11 h 12 min by month's end. Set against the rest of the year, December is Say's 1st-clearest and 4th-windiest month. For the whole year in context, see Say's year-round climate.

Daytime high: 33°; 10th warmest
Overnight low: 18°; 2nd coldest
Rainfall: 0 mm; 0 wet days
Daylight: 11 h 12 min; 7:10 AM – 6:24 PM
Cloud cover: 27%; 1st clearest
Wind: 11 km/h; 4th windiest
Solar energy: 5.71 kWh/m²
Travel score: 4.8; out of 10

← November Say year-round climate January →Best places to visit in December

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 34°C in the first days to 31°C by the end.

A typical December day in Say reaches about 33°C in the afternoon and slips back to 18°C overnight — a 15°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 36°C. Set against its neighbours, December runs about 3°C cooler than November and about 1°C warmer than January.

	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)	35	35	34	34	34	34	34	34	34	33	33	33	33	33	33	33	33	32	32	32	32	32	32	32	32	31	31	31	31	31	31
Avg low (°C)	19	19	19	19	19	19	19	19	18	18	18	18	18	18	18	18	18	18	18	18	18	17	17	17	17	17	17	17	17	17	17

	Avg high (°C)	Avg low (°C)
1	35	19
2	35	19
3	34	19
4	34	19
5	34	19
6	34	19
7	34	19
8	34	19
9	34	18
10	33	18
11	33	18
12	33	18
13	33	18
14	33	18
15	33	18
16	33	18
17	33	18
18	32	18
19	32	18
20	32	18
21	32	18
22	32	17
23	32	17
24	32	17
25	32	17
26	31	17
27	31	17
28	31	17
29	31	17
30	31	17
31	31	17

How December really feels in Say

Once humidity and wind are folded in, December averages 21 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 December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Say weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 11th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	32° / 17°	0	0	11.3	5.6
Feb	35° / 20°	0	0.1	11.6	3.5
Mar	39° / 24°	2	0.4	11.9	1.0
Apr	41° / 27°	3	1	12.3	0.0
May	40° / 29°	12	3.2	12.6	0.3
Jun	37° / 27°	30	6.8	12.8	1.9
Jul	33° / 25°	78	13.2	12.7	3.1
Aug	32° / 24°	152	17.6	12.4	3.4
Sep	33° / 25°	60	9.3	12.1	3.3
Oct	37° / 25°	12	3.1	11.7	2.0
Nov	36° / 20°	0	0	11.4	2.6
Dec	33° / 18°	0	0	11.2	4.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 70% of the time in December, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 12% of December, with mostly cloudy or overcast conditions the remaining 18%. 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	78	78	78	77	77	78	78	79	80	80	81	81	81	83	83	83	83	85	85	85	85	86	86	86	86	86	86	86	86	86
Cloudier (%)	23	22	22	22	23	23	22	22	21	20	20	19	19	19	17	17	17	17	15	15	15	15	14	14	14	14	14	14	14	14	14

	Clearer (%)	Cloudier (%)
1	77	23
2	78	22
3	78	22
4	78	22
5	77	23
6	77	23
7	78	22
8	78	22
9	79	21
10	80	20
11	80	20
12	81	19
13	81	19
14	81	19
15	83	17
16	83	17
17	83	17
18	83	17
19	85	15
20	85	15
21	85	15
22	85	15
23	86	14
24	86	14
25	86	14
26	86	14
27	86	14
28	86	14
29	86	14
30	86	14
31	86	14

Chance of precipitation in December

Any precipitation

Say gets around 0 mm of rain over 0 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 0% and peaks near 0% on the wettest days.

	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 (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

	Rain chance (%)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	0
15	0
16	0
17	0
18	0
19	0
20	0
21	0
22	0
23	0
24	0
25	0
26	0
27	0
28	0
29	0
30	0
31	0

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December 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	31
Dry (%)	99	99	99	99	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
Comfortable (%)	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	0	0	0	0

	Dry (%)	Comfortable (%)
1	99	1
2	99	1
3	99	1
4	99	1
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0
31	100	0

Wind in December

Winds average 11 km/h in December.

Across December, daily wind ranges from about 11 km/h on the calmest days to 12 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)	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	12	12	12	12	12
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	11	calm
2	11	calm
3	11	calm
4	11	calm
5	11	calm
6	11	calm
7	11	calm
8	11	calm
9	11	calm
10	11	calm
11	11	calm
12	11	calm
13	11	calm
14	11	calm
15	11	calm
16	11	calm
17	11	calm
18	11	calm
19	11	calm
20	11	calm
21	11	calm
22	11	calm
23	11	calm
24	11	calm
25	11	calm
26	11	calm
27	12	calm
28	12	calm
29	12	calm
30	12	calm
31	12	calm

Sunrise & sunset in December

DaylightNight

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

Days shrink by about 6 minutes over December. Sunrise moves from 7:02 AM to 7:17 AM, and sunset from 6:19 PM to 6:31 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)	11.3	11.3	11.3	11.3	11.3	11.3	11.3	11.3	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	11.2	11.2	11.2	11.2	11.2	11.2	11.2
Sunrise (AM)	7:02	7:02	7:03	7:03	7:04	7:04	7:05	7:06	7:06	7:07	7:07	7:08	7:08	7:09	7:09	7:10	7:10	7:11	7:11	7:12	7:12	7:13	7:13	7:14	7:14	7:14	7:15	7:15	7:16	7:16	7:17
Sunset (PM)	6:19	6:19	6:19	6:20	6:20	6:20	6:20	6:21	6:21	6:21	6:22	6:22	6:22	6:23	6:23	6:24	6:24	6:25	6:25	6:25	6:26	6:26	6:27	6:27	6:28	6:28	6:29	6:29	6:30	6:30	6:31

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.3	7:02	6:19
2	11.3	7:02	6:19
3	11.3	7:03	6:19
4	11.3	7:03	6:20
5	11.3	7:04	6:20
6	11.3	7:04	6:20
7	11.3	7:05	6:20
8	11.3	7:06	6:21
9	11.2	7:06	6:21
10	11.2	7:07	6:21
11	11.2	7:07	6:22
12	11.2	7:08	6:22
13	11.2	7:08	6:22
14	11.2	7:09	6:23
15	11.2	7:09	6:23
16	11.2	7:10	6:24
17	11.2	7:10	6:24
18	11.2	7:11	6:25
19	11.2	7:11	6:25
20	11.2	7:12	6:25
21	11.2	7:12	6:26
22	11.2	7:13	6:26
23	11.2	7:13	6:27
24	11.2	7:14	6:27
25	11.2	7:14	6:28
26	11.2	7:14	6:28
27	11.2	7:15	6:29
28	11.2	7:15	6:29
29	11.2	7:16	6:30
30	11.2	7:16	6:30
31	11.2	7:17	6:31

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.71 kWh/m².

For context, solar energy here swings from a low near 5.47 kWh/m² to a high of 6.97 kWh/m² in April across the year — December's 5.71 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)	5.8	5.8	5.8	5.8	5.8	5.8	5.8	5.8	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	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	Bright

	Solar energy (kWh/m²)	Level
1	5.8	Bright
2	5.8	Bright
3	5.8	Bright
4	5.8	Bright
5	5.8	Bright
6	5.8	Bright
7	5.8	Bright
8	5.8	Bright
9	5.7	Bright
10	5.7	Bright
11	5.7	Bright
12	5.7	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
31	5.7	Bright

Planning a trip in December

Hazard calendar for Say

In seasonPeak

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

Say sees seasonal dust haze (January–July), heaviest in March.

Dust

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is December a good time to visit Say?

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

4.8

Sightseeing

2nd-best month of the year

8.2

Beach & pool

2nd-best month of the year

December is a reasonable time to visit Say for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Say in December

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

In December, Say sees daytime highs around 33°C and nights near 18°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in Say in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Say peaks around August 18 at about 13 (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	11	13	10	10	11	11	13	12	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	11	Extreme
Mar	13	Extreme
Apr	10	Extreme
May	10	Extreme
Jun	11	Extreme
Jul	11	Extreme
Aug	13	Extreme
Sep	12	Extreme
Oct	11	Extreme
Nov	9	Very high
Dec	8	Very high

Air quality in Say in December

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Say is worst in February — around 89 µg/m³ PM2.5 (unhealthy), about 6.0× the cleanest month (August, 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)	78	89	85	61	35	26	17	15	20	40	61	71
Level	Unhealthy	Unhealthy	Unhealthy	Unhealthy	Moderate	Moderate	Moderate	Moderate	Moderate	Poor	Unhealthy	Unhealthy

	PM2.5 (µg/m³)	Level
Jan	78	Unhealthy
Feb	89	Unhealthy
Mar	85	Unhealthy
Apr	61	Unhealthy
May	35	Moderate
Jun	26	Moderate
Jul	17	Moderate
Aug	15	Moderate
Sep	20	Moderate
Oct	40	Poor
Nov	61	Unhealthy
Dec	71	Unhealthy

Location & terrain

Where is Say?

Say sits at 13.1°N, 2.4°E, 181 m above sea level, in Niger. The nearest listed city is Kollo, 23 km away.

Topography around Say

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

Within 3 km, the terrain around Say has only modest variations in elevation — a maximum elevation change of 48 m around an average of 185 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 93 m; within 80 km, only modest variations in elevation — a maximum elevation change of 124 m.

The land around Say is covered by grassland (28%) and cropland (27%) within 3 km, grassland (60%) within 16 km, and grassland (61%) within 80 km.

3 km

48 m

grassland 28%

16 km

93 m

grassland 60%

80 km

124 m

grassland 61%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland

← November Say year-round climate January →Best places to visit in December

December weather nearby: Kollo 23 km · Youri Kourtéré 29 km · Niamey 54 km · Birnin Gaouré 59 km · Torodi 62 km · Dosso 90 km · Baléyara 99 km · Diapaga 130 km

Niger travel facts

Travel advisory: Level 4; Do Not Travel
Power plugs: Type A / B / C / D / E / F; 220 V · 50 Hz
Prices: ≈ 36% of US; price level, 2025
GDP per capita: $775; 2025
Happiness: 4.9 / 10; World Happiness, 2025
Homicide rate: 4.4; per 100k, 2012
Road deaths: 25.5; per 100k/yr, 2019
Income group: Low; World Bank
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 Say (13.1007°, 2.3689°, elevation 181 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	35	19
2	35	19
3	34	19
4	34	19
5	34	19
6	34	19
7	34	19
8	34	19
9	34	18
10	33	18
11	33	18
12	33	18
13	33	18
14	33	18
15	33	18
16	33	18
17	33	18
18	32	18
19	32	18
20	32	18
21	32	18
22	32	17
23	32	17
24	32	17
25	32	17
26	31	17
27	31	17
28	31	17
29	31	17
30	31	17
31	31	17

	Clearer (%)	Cloudier (%)
1	77	23
2	78	22
3	78	22
4	78	22
5	77	23
6	77	23
7	78	22
8	78	22
9	79	21
10	80	20
11	80	20
12	81	19
13	81	19
14	81	19
15	83	17
16	83	17
17	83	17
18	83	17
19	85	15
20	85	15
21	85	15
22	85	15
23	86	14
24	86	14
25	86	14
26	86	14
27	86	14
28	86	14
29	86	14
30	86	14
31	86	14

	Rain chance (%)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	0
15	0
16	0
17	0
18	0
19	0
20	0
21	0
22	0
23	0
24	0
25	0
26	0
27	0
28	0
29	0
30	0
31	0

	Dry (%)	Comfortable (%)
1	99	1
2	99	1
3	99	1
4	99	1
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0
31	100	0

	Avg high (°C)	Avg low (°C)
1	35	19
2	35	19
3	34	19
4	34	19
5	34	19
6	34	19
7	34	19
8	34	19
9	34	18
10	33	18
11	33	18
12	33	18
13	33	18
14	33	18
15	33	18
16	33	18
17	33	18
18	32	18
19	32	18
20	32	18
21	32	18
22	32	17
23	32	17
24	32	17
25	32	17
26	31	17
27	31	17
28	31	17
29	31	17
30	31	17
31	31	17

	Clearer (%)	Cloudier (%)
1	77	23
2	78	22
3	78	22
4	78	22
5	77	23
6	77	23
7	78	22
8	78	22
9	79	21
10	80	20
11	80	20
12	81	19
13	81	19
14	81	19
15	83	17
16	83	17
17	83	17
18	83	17
19	85	15
20	85	15
21	85	15
22	85	15
23	86	14
24	86	14
25	86	14
26	86	14
27	86	14
28	86	14
29	86	14
30	86	14
31	86	14

	Rain chance (%)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	0
15	0
16	0
17	0
18	0
19	0
20	0
21	0
22	0
23	0
24	0
25	0
26	0
27	0
28	0
29	0
30	0
31	0

	Dry (%)	Comfortable (%)
1	99	1
2	99	1
3	99	1
4	99	1
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0
31	100	0

	Avg high (°C)	Avg low (°C)
1	35	19
2	35	19
3	34	19
4	34	19
5	34	19
6	34	19
7	34	19
8	34	19
9	34	18
10	33	18
11	33	18
12	33	18
13	33	18
14	33	18
15	33	18
16	33	18
17	33	18
18	32	18
19	32	18
20	32	18
21	32	18
22	32	17
23	32	17
24	32	17
25	32	17
26	31	17
27	31	17
28	31	17
29	31	17
30	31	17
31	31	17

	Clearer (%)	Cloudier (%)
1	77	23
2	78	22
3	78	22
4	78	22
5	77	23
6	77	23
7	78	22
8	78	22
9	79	21
10	80	20
11	80	20
12	81	19
13	81	19
14	81	19
15	83	17
16	83	17
17	83	17
18	83	17
19	85	15
20	85	15
21	85	15
22	85	15
23	86	14
24	86	14
25	86	14
26	86	14
27	86	14
28	86	14
29	86	14
30	86	14
31	86	14

	Rain chance (%)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	0
15	0
16	0
17	0
18	0
19	0
20	0
21	0
22	0
23	0
24	0
25	0
26	0
27	0
28	0
29	0
30	0
31	0

	Dry (%)	Comfortable (%)
1	99	1
2	99	1
3	99	1
4	99	1
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0
31	100	0