Bīrjand weather in December

In December, Bīrjand sees average daytime highs of 11°C and overnight lows near -1°C, with 22 mm of precipitation across 4.6 wet days and about 9.9 hours of daylight. It is the 10th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 13°C in the first days to 10°C by the end. The sky is clear or mostly clear about 63% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 hours at the start of December to 9 h 54 min by month's end. Set against the rest of the year, December is Bīrjand's 8th-clearest and 12th-windiest month. For the whole year in context, see Bīrjand's year-round climate.

Daytime high
11°
10th warmest
Overnight low
-1°
3rd coldest
Precipitation
22 mm
4.6 wet days
Daylight
9 h 48 min
6:34 AM – 4:25 PM
Cloud cover
32%
8th clearest
Wind
8 km/h
12th windiest
Solar energy
3.33 kWh/m²
Travel score
3.3
out of 10

Bīrjand is city in South Khorasan province, Iran.

Air quality
Moderate
PM2.5 12.1 µg/m³ · 2020
Density
4,602/km²
people per km²
Founded
1201

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 13°C in the first days to 10°C by the end.

A typical December day in Bīrjand reaches about 11°C in the afternoon and slips back to -1°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 6°C and 16°C. Set against its neighbours, December runs about 5°C cooler than November and about 3°C warmer than January.

-10°10°20°151015202531
Avg high (°C)Avg low (°C)
1131
2131
3131
4121
5120
6120
7120
8120
9120
10120
11110
12110
13110
14110
15110
1611-1
1711-1
1811-1
1911-1
2011-1
2111-1
2210-1
2310-1
2410-1
2510-1
2610-2
2710-2
2810-2
2910-2
3010-2
3110-2

How December really feels in Bīrjand

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 31 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
31
wind chill below the day's low

The story in December is cold — wind chill drags the overnight "feels like" below the raw low.

Bīrjand weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -3°376.82.710.11.8
Feb11° / -1°457.61.710.82.8
Mar16° / 4580.611.85.3
Apr22° / 204.8012.87.7
May28° / 14°61.7013.77.7
Jun32° / 18°10.2014.15.5
Jul33° / 19°00013.95.1
Aug31° / 17°00.1013.26.1
Sep29° / 13°10.2012.27.9
Oct23° / 30.7011.29.2
Nov16° / 102.80.110.36.4
Dec11° / -1°224.60.79.93.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 63% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 23%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18317
28218
38218
48119
58020
67921
77921
87723
97723
107624
117624
127525
137525
147525
157525
167426
177426
187525
197525
207525
217525
227525
237624
247624
257624
267624
277624
287624
297525
307525
317525

Chance of precipitation in December

Any precipitationSnow

Bīrjand gets around 22 mm of rain and snow over 4.6 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 15% and peaks near 17% on the wettest days, and about 1 day brings snow.

0%10%20%30%151015202531
Rain chance (%)Snow chance (%)
1131
2141
3141
4151
5151
6152
7162
8162
9172
10172
11172
12172
13172
14172
15172
16163
17163
18163
19153
20153
21153
22153
23143
24143
25143
26143
27143
28144
29144
30144
31154

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.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in December

Winds average 8 km/h in December, the calmest month.

Across December, 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.

0246810151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 hours at the start of December to 9 h 54 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 6:23 AM to 6:40 AM, and sunset from 4:23 PM to 4:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.06:234:23
210.06:244:23
310.06:254:22
49.96:264:22
59.96:264:23
69.96:274:23
79.96:284:23
89.96:294:23
99.96:294:23
109.96:304:23
119.96:314:23
129.96:314:23
139.96:324:24
149.96:334:24
159.86:334:24
169.86:344:25
179.86:354:25
189.86:354:25
199.86:364:26
209.86:364:26
219.86:374:27
229.86:374:27
239.86:384:27
249.86:384:28
259.86:384:29
269.86:394:29
279.86:394:30
289.86:404:30
299.86:404:31
309.96:404:31
319.96:404:32

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 3.33 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 3.33 kWh/m² to a high of 8.1 kWh/m² in June across the year — December's 3.33 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.5Moderate
23.5Moderate
33.5Moderate
43.4Moderate
53.4Moderate
63.4Moderate
73.4Moderate
83.4Moderate
93.3Moderate
103.3Moderate
113.3Moderate
123.3Moderate
133.3Moderate
143.3Moderate
153.3Moderate
163.3Moderate
173.3Moderate
183.3Moderate
193.3Moderate
203.3Moderate
213.3Moderate
223.3Moderate
233.3Moderate
243.3Moderate
253.3Moderate
263.3Moderate
273.4Moderate
283.4Moderate
293.4Moderate
303.4Moderate
313.4Moderate
Planning a trip in December

Is December a good time to visit Bīrjand?

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

3.3
Sightseeing
10th-best month of the year
0.0
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Bīrjand.

What to pack for Bīrjand in December

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

In December, Bīrjand sees daytime highs around 11°C and nights near -1°C. Pack a warm layer. About 5 days see rain.

a warm layer

UV index in Bīrjand in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Bīrjand peaks around July 19 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 19UV 12Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb6High
Mar7Very high
Apr8Very high
May10Extreme
Jun10Extreme
Jul12Extreme
Aug11Extreme
Sep8Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Bīrjand 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 Bīrjand is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (November, 7 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Bīrjand's WHO annual average of 12.1 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1717 µg/m³Nov 237 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb10Good
Mar12Good
Apr16Moderate
May16Moderate
Jun14Moderate
Jul18Moderate
Aug14Moderate
Sep14Moderate
Oct10Good
Nov7Good
Dec7Good
Location & terrain

Where is Bīrjand?

Bīrjand sits at 32.9°N, 59.2°E, 1,459 m above sea level, in Iran. The nearest listed city is Qā’en, 96 km away.

FerdowsNehbandānGonābādBoshrūyehKhvāfTabasTāybād

Topography around Bīrjand

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

Within 3 km, the terrain around Bīrjand has only modest variations in elevation — a maximum elevation change of 119 m around an average of 1,483 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,205 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,742 m.

The land around Bīrjand is covered by artificial surfaces (63%) and bare terrain (33%) within 3 km, bare terrain (89%) within 16 km, and bare terrain (97%) within 80 km.

3 km
119 m
16 km
1,205 m
80 km
1,742 m
treesgrasslandcroplandartificial surfacesbare terrain
December weather nearby: Qā’en 96 km · Ferdows 161 km · Nehbandān 166 km · Gonābād 173 km · Boshrūyeh 200 km · Khvāf 208 km · Tabas 228 km · Tāybād 253 km

Iran travel facts

Travel advisory
Level 4
Do Not Travel
Power plugs
Type C / F
220 V · 50 Hz
Prices
≈ 352% of US
price level, 2025
GDP per capita
$3,924
2025
Happiness
5.2 / 10
World Happiness, 2025
Safe drinking water
94%
of population, 2024
Homicide rate
2.4
per 100k, 2014
Road deaths
21.5
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 492
Religion
Muslim 99%Christian 1%Baha'i 0%agnostic 0%

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 Bīrjand (32.8663°, 59.2211°, elevation 1,459 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).