Climate and average weather in Douglas
In Douglas, the summers are sweltering, dry, and clear and the winters are mild and mostly clear.
Over the course of the year, the temperature in Douglas typically varies from 36°F to 95°F, and is rarely below 27°F or above 102°F. June is the hottest month of the year, while December is the coldest.
Based on the travel score, the best times of year to visit Douglas for warm-weather activities are from mid February to early May and early October to late November.
- Hottest
- Jun
- 95°
- Coldest
- Dec
- 36°
- Wettest
- Jul
- 2.0 in
- Driest
- Apr
- 0.2 in
- Rain / yr
- 10.9 in
- 51 wet days
- Daylight
- 10.0–14.0 h
- shortest–longest
- Elevation
- 4,009 ft
- 31.3°N
- Clearest
- May
- 24% cloud
Douglas is city in Cochise County, Arizona, United States.
- Density
- 642/km²
- people per km²
- Founded
- 1905
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Douglas weather by month, at a glance
The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.
Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around mid February to early May.
Temperature through the year
Daily average highs and lows in Douglas, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 4.1 months, from May 16 to September 18, with daily high temperatures above 87°F. The hottest month of the year in Douglas is June, with an average high of 95°F and low of 67°F.
The cool season lasts 3.1 months, from November 24 to February 24, with daily high temperatures below 67°F. The coldest month of the year in Douglas is December, with an average low of 36°F and high of 61°F.
Days typically run about 26°F warmer than nights, with the widest day–night swing (around 30°F) in May.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 62 | 65 | 72 | 79 | 88 | 95 | 93 | 91 | 88 | 80 | 70 | 61 |
| Avg low (°F) | 36 | 39 | 44 | 49 | 58 | 67 | 70 | 68 | 64 | 54 | 44 | 36 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| Jan | 62 | 36 |
| Feb | 65 | 39 |
| Mar | 72 | 44 |
| Apr | 79 | 49 |
| May | 88 | 58 |
| Jun | 95 | 67 |
| Jul | 93 | 70 |
| Aug | 91 | 68 |
| Sep | 88 | 64 |
| Oct | 80 | 54 |
| Nov | 70 | 44 |
| Dec | 61 | 36 |
How hot and cold Douglas really feels
The felt-temperature range through the year — heat index on the day's high (summer humidity), wind chill on the night's low (winter wind). The dashed lines are the plain thermometer; the gap is how much hotter or colder it really feels.
On the hottest afternoons, once humidity is folded in, Douglas feels like about 97°F (around June 22). About 103 days a year carry some heat stress, peaking in June.
On the coldest nights, wind chill pulls the feels-like down to about 30°F (around December 24), with roughly 50 freezing days a year (feels-like at or below 32°F), worst in December.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels-like high (°F) | 62 | 65 | 72 | 79 | 88 | 95 | 93 | 91 | 88 | 80 | 70 | 61 |
| Air high (°F) | 62 | 65 | 72 | 79 | 88 | 95 | 93 | 91 | 88 | 80 | 70 | 61 |
| Feels-like low (°F) | 31 | 34 | 40 | 47 | 58 | 67 | 70 | 68 | 64 | 54 | 40 | 32 |
| Air low (°F) | 36 | 39 | 44 | 49 | 58 | 67 | 70 | 68 | 64 | 54 | 44 | 36 |
| Feels-like high (°F) | Air high (°F) | Feels-like low (°F) | Air low (°F) | |
|---|---|---|---|---|
| Jan | 62 | 62 | 31 | 36 |
| Feb | 65 | 65 | 34 | 39 |
| Mar | 72 | 72 | 40 | 44 |
| Apr | 79 | 79 | 47 | 49 |
| May | 88 | 88 | 58 | 58 |
| Jun | 95 | 95 | 67 | 67 |
| Jul | 93 | 93 | 70 | 70 |
| Aug | 91 | 91 | 68 | 68 |
| Sep | 88 | 88 | 64 | 64 |
| Oct | 80 | 80 | 54 | 54 |
| Nov | 70 | 70 | 40 | 44 |
| Dec | 61 | 61 | 32 | 36 |
Average hourly temperature in Douglas
A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on June afternoons, near 95°F, and coldest before dawn in December, near 36°F.
Douglas weather by month
Every month at a glance. Click a month for its detailed page.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 62° / 36° | 1.1 | 3.5 | 10.2 | 6.4 |
| Feb | 65° / 39° | 0.9 | 3.7 | 10.9 | 7.2 |
| Mar | 72° / 44° | 0.6 | 3 | 11.8 | 8.3 |
| Apr | 79° / 49° | 0.2 | 1.3 | 12.7 | 8.5 |
| May | 88° / 58° | 0.2 | 1.2 | 13.6 | 6.0 |
| Jun | 95° / 67° | 0.4 | 2.1 | 14 | 3.1 |
| Jul | 93° / 70° | 2.0 | 10.4 | 13.8 | 3.0 |
| Aug | 91° / 68° | 1.8 | 11 | 13.1 | 3.8 |
| Sep | 88° / 64° | 1.2 | 5.1 | 12.2 | 5.3 |
| Oct | 80° / 54° | 0.7 | 3.2 | 11.2 | 8.0 |
| Nov | 70° / 44° | 0.8 | 2.4 | 10.4 | 8.1 |
| Dec | 61° / 36° | 1.1 | 4.5 | 10 | 6.1 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Douglas gets about 10.9 in of precipitation a year. On a typical day the chance of rain is mostly dry, but that rises and falls sharply with the seasons.
The wetter season lasts 2.8 months, from around Jun 28 to Sep 19, peaking in August at about 42% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Apr 29.
July is the wettest month by volume, with 2.0 in over about 10 wet days; April is the driest, with 0.2 in.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 12 | 13 | 10 | 4 | 4 | 9 | 33 | 35 | 18 | 10 | 9 | 14 |
| Rain days | 4 | 4 | 3 | 1 | 1 | 2 | 10 | 11 | 5 | 3 | 2 | 5 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 12 | 4 |
| Feb | 13 | 4 |
| Mar | 10 | 3 |
| Apr | 4 | 1 |
| May | 4 | 1 |
| Jun | 9 | 2 |
| Jul | 33 | 10 |
| Aug | 35 | 11 |
| Sep | 18 | 5 |
| Oct | 10 | 3 |
| Nov | 9 | 2 |
| Dec | 14 | 5 |
Monthly rainfall
Over a full year, Douglas collects about 10.9 in of rain across 51 wet days — roughly 0.9 in in an average month.
It doesn’t fall evenly. July is the wettest month with 2.0 in, while April is the driest at just 0.2 in. The three wettest months alone bring about 45% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (in) | 1.1 | 0.9 | 0.6 | 0.2 | 0.2 | 0.4 | 2.0 | 1.8 | 1.2 | 0.7 | 0.8 | 1.1 |
| Rain days | 4 | 4 | 3 | 1 | 1 | 2 | 10 | 11 | 5 | 3 | 2 | 5 |
| Rainfall (in) | Rain days | |
|---|---|---|
| Jan | 1.1 | 4 |
| Feb | 0.9 | 4 |
| Mar | 0.6 | 3 |
| Apr | 0.2 | 1 |
| May | 0.2 | 1 |
| Jun | 0.4 | 2 |
| Jul | 2.0 | 10 |
| Aug | 1.8 | 11 |
| Sep | 1.2 | 5 |
| Oct | 0.7 | 3 |
| Nov | 0.8 | 2 |
| Dec | 1.1 | 5 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Douglas, the average share of the sky covered by clouds shows moderate seasonal variation over the course of the year.
The clearer part of the year begins around March 22 and lasts for 3.4 months, ending around July 2. The clearest month is June, when the sky is clear, mostly clear, or partly cloudy 87% of the time on average.
The cloudier part of the year begins around July 3 and lasts for 1.9 months, ending around August 28. The cloudiest month is February, when it is overcast or mostly cloudy 31% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 70 | 69 | 76 | 82 | 85 | 87 | 70 | 74 | 85 | 86 | 78 | 71 |
| Cloudier (%) | 30 | 31 | 24 | 18 | 15 | 13 | 30 | 26 | 15 | 14 | 22 | 29 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 70 | 30 |
| Feb | 69 | 31 |
| Mar | 76 | 24 |
| Apr | 82 | 18 |
| May | 85 | 15 |
| Jun | 87 | 13 |
| Jul | 70 | 30 |
| Aug | 74 | 26 |
| Sep | 85 | 15 |
| Oct | 86 | 14 |
| Nov | 78 | 22 |
| Dec | 71 | 29 |
Daylight, sunrise and sunset
Hours of daylight through the year, with sunrise and sunset times.
The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around June 7, brings about 14 hours of light; the shortest, around January 1, only 10 hours — a swing of roughly 4 hours.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 10.2 | 10.9 | 11.8 | 12.7 | 13.6 | 14.0 | 13.8 | 13.1 | 12.2 | 11.2 | 10.4 | 10.0 |
| Sunrise (AM) | 7:22 | 7:07 | 6:35 | 5:55 | 5:27 | 5:18 | 5:28 | 5:48 | 6:07 | 6:27 | 6:52 | 7:15 |
| Sunset (PM) | 5:33 | 5:59 | 6:21 | 6:41 | 7:02 | 7:19 | 7:19 | 6:57 | 6:18 | 5:40 | 5:15 | 5:13 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 10.2 | 7:22 | 5:33 |
| Feb | 10.9 | 7:07 | 5:59 |
| Mar | 11.8 | 6:35 | 6:21 |
| Apr | 12.7 | 5:55 | 6:41 |
| May | 13.6 | 5:27 | 7:02 |
| Jun | 14.0 | 5:18 | 7:19 |
| Jul | 13.8 | 5:28 | 7:19 |
| Aug | 13.1 | 5:48 | 6:57 |
| Sep | 12.2 | 6:07 | 6:18 |
| Oct | 11.2 | 6:27 | 5:40 |
| Nov | 10.4 | 6:52 | 5:15 |
| Dec | 10.0 | 7:15 | 5:13 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Douglas averages about 19 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 10 and 23 days.
The sunnier stretch runs 2.8 months, from around Sep 6 to Nov 28. The sunniest month is October, with roughly 22 sunny days (bright).
The greyest month is July, down near 12 sunny days — about 44% fewer than the October peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 17 | 15 | 19 | 21 | 23 | 21 | 13 | 14 | 21 | 23 | 20 | 18 |
| Sky | Bright | Bright | Bright | Bright | Bright | Bright | Mixed | Mixed | Bright | Bright | Bright | Bright |
| Sunny days | Sky | |
|---|---|---|
| Jan | 17 | Bright |
| Feb | 15 | Bright |
| Mar | 19 | Bright |
| Apr | 21 | Bright |
| May | 23 | Bright |
| Jun | 21 | Bright |
| Jul | 13 | Mixed |
| Aug | 14 | Mixed |
| Sep | 21 | Bright |
| Oct | 23 | Bright |
| Nov | 20 | Bright |
| Dec | 18 | Bright |
Humidity comfort
Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.
Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.
In Douglas, how humid it feels changes dramatically over the year.
The more humid part of the year lasts 3.0 months, from around June 27 to September 24. The muggiest month is August, when the air feels humid, muggy or worse about 41% of the time.
The most comfortable stretch runs from around September 25 to June 26, and May is the most comfortable month — the air is dry or comfortable 100% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 100 | 100 | 100 | 92 | 38 | 27 | 64 | 95 | 100 | 100 |
| Comfortable (%) | 0 | 0 | 0 | 0 | 0 | 5 | 28 | 32 | 21 | 5 | 0 | 0 |
| Humid (%) | 0 | 0 | 0 | 0 | 0 | 3 | 30 | 37 | 14 | 1 | 0 | 0 |
| Muggy (%) | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 4 | 1 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| Jan | 100 | 0 | 0 | 0 |
| Feb | 100 | 0 | 0 | 0 |
| Mar | 100 | 0 | 0 | 0 |
| Apr | 100 | 0 | 0 | 0 |
| May | 100 | 0 | 0 | 0 |
| Jun | 92 | 5 | 3 | 0 |
| Jul | 38 | 28 | 30 | 4 |
| Aug | 27 | 32 | 37 | 4 |
| Sep | 64 | 21 | 14 | 1 |
| Oct | 95 | 5 | 1 | 0 |
| Nov | 100 | 0 | 0 | 0 |
| Dec | 100 | 0 | 0 | 0 |
Wind
Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.
This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.
Across the year, average wind speed in Douglas is typically calm, near 6 mph, and varies moderately with the seasons.
The windier part of the year lasts 4.7 months, from around Jan 29 to Jun 20. The windiest month is April, averaging about 7 mph (calm).
The calmer part of the year runs from around Jun 21 to Jan 28, with August the calmest month at about 4 mph.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 6 | 6 | 7 | 7 | 7 | 6 | 5 | 4 | 5 | 6 | 6 | 6 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (mph) | Feels | |
|---|---|---|
| Jan | 6 | calm |
| Feb | 6 | calm |
| Mar | 7 | calm |
| Apr | 7 | calm |
| May | 7 | calm |
| Jun | 6 | calm |
| Jul | 5 | calm |
| Aug | 4 | calm |
| Sep | 5 | calm |
| Oct | 6 | calm |
| Nov | 6 | calm |
| Dec | 6 | calm |
Best time to visit Douglas
To characterize how pleasant the weather is in Douglas throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around late February, Douglas is still near the start of its best-weather window — great conditions with the peak-season crowds not yet at full swing.
Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.
The travel score favors clear, rainless days with daytime highs between 64°F and 82°F. Based on this score, the best times of year to visit Douglas for general outdoor tourist activities run from early February to early May and again from early October to early December, with a peak score in the first week of April.
The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Travel score (0–10) | 6.4 | 7.2 | 8.3 | 8.5 | 6.0 | 3.2 | 3.0 | 3.8 | 5.3 | 7.9 | 8.1 | 6.2 |
| Rating | good | good | ideal | ideal | good | poor | poor | fair | fair | ideal | ideal | good |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 6.4 | good |
| Feb | 7.2 | good |
| Mar | 8.3 | ideal |
| Apr | 8.5 | ideal |
| May | 6.0 | good |
| Jun | 3.2 | poor |
| Jul | 3.0 | poor |
| Aug | 3.8 | fair |
| Sep | 5.3 | fair |
| Oct | 7.9 | ideal |
| Nov | 8.1 | ideal |
| Dec | 6.2 | good |
The beach/pool score favors clear, rainless days with daytime highs between 75°F and 93°F. Based on this score, the best times of year to visit Douglas for hot-weather activities run from late March to early June and again from early September to late October, with a peak score in the first week of May.
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
What to pack for Douglas, by month
Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.
For a warm-season trip around June (highs near 95°F), the essentials are light clothes and sun protection. In the cold season around December (highs near 61°F), pack a warm layer.
In June, Douglas sees daytime highs around 95°F and nights near 67°F. Pack light clothes and sun protection.
UV index (midday) in Douglas by month
Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.
Under clear skies, the midday UV index in Douglas peaks around June 20 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 4 (moderate).
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) | 5 | 5 | 8 | 10 | 10 | 12 | 12 | 12 | 10 | 7 | 5 | 4 |
| Level | Moderate | High | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Very high | Very high | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 5 | Moderate |
| Feb | 5 | High |
| Mar | 8 | Very high |
| Apr | 10 | Very high |
| May | 10 | Extreme |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 12 | Extreme |
| Sep | 10 | Very high |
| Oct | 7 | Very high |
| Nov | 5 | High |
| Dec | 4 | Moderate |
Average hourly UV index in Douglas
Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.
The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
UV falls off far faster than brightness as the sun drops, so even in June the burn window is concentrated in the middle of the day: about 9 hours a day reach index 3 (protection recommended), and 6.5 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV ≥ 3 (h/day) | 4 | 5 | 6.5 | 7.5 | 8.5 | 9 | 8.5 | 8 | 7.5 | 6 | 5 | 3.5 |
| UV ≥ 6 (h/day) | 0 | 0 | 3.5 | 5.5 | 6 | 6.5 | 6.5 | 6 | 5 | 3 | 0 | 0 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 4 | 0 |
| Feb | 5 | 0 |
| Mar | 6.5 | 3.5 |
| Apr | 7.5 | 5.5 |
| May | 8.5 | 6 |
| Jun | 9 | 6.5 |
| Jul | 8.5 | 6.5 |
| Aug | 8 | 6 |
| Sep | 7.5 | 5 |
| Oct | 6 | 3 |
| Nov | 5 | 0 |
| Dec | 3.5 | 0 |
Growing season
Douglas is mild enough that a frost-free day stays more likely than not even in midwinter. Nights are reliably above freezing from about February 24 to November 25 (275 days); outside that window a hard frost is an occasional risk.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 74 | 86 | 97 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 95 | 74 |
| Frost nights | 31 | 26 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7 | 31 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 74 | 31 |
| Feb | 86 | 26 |
| Mar | 97 | 0 |
| Apr | 100 | 0 |
| May | 100 | 0 |
| Jun | 100 | 0 |
| Jul | 100 | 0 |
| Aug | 100 | 0 |
| Sep | 100 | 0 |
| Oct | 100 | 0 |
| Nov | 95 | 7 |
| Dec | 74 | 31 |
Growing degree days
Growing degree days tally heat above 50°F: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Douglas banks about 5,784 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around July.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°F·days) | 0 | 62 | 242 | 430 | 702 | 929 | 984 | 917 | 780 | 536 | 197 | 6 |
| Growing degree days (°F·days) | |
|---|---|
| Jan | 0 |
| Feb | 62 |
| Mar | 242 |
| Apr | 430 |
| May | 702 |
| Jun | 929 |
| Jul | 984 |
| Aug | 917 |
| Sep | 780 |
| Oct | 536 |
| Nov | 197 |
| Dec | 6 |
Solar energy
Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.
Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.
Douglas receives about 6.0 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 3.5 and 8.3 kWh/m².
The brighter stretch of the year lasts 6.3 months, from around Mar 11 to Sep 18. The brightest month is May, averaging about 8.2 kWh/m² (intense).
The dimmest month is December, down near 3.5 kWh/m² — roughly 57% less than the May peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 3.8 | 4.7 | 6.3 | 7.6 | 8.3 | 8.2 | 7.0 | 6.7 | 6.0 | 5.2 | 4.1 | 3.5 |
| Level | Moderate | Bright | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 3.8 | Moderate |
| Feb | 4.7 | Bright |
| Mar | 6.3 | Intense |
| Apr | 7.6 | Intense |
| May | 8.3 | Intense |
| Jun | 8.2 | Intense |
| Jul | 7.0 | Intense |
| Aug | 6.7 | Intense |
| Sep | 6.0 | Intense |
| Oct | 5.2 | Bright |
| Nov | 4.1 | Bright |
| Dec | 3.5 | Moderate |
Where is Douglas?
Douglas sits at 31.3°N, 109.5°W, 4,009 ft above sea level, in United States. The nearest listed city is Agua Prieta, 1.2 mi away.
Topography around Douglas
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Douglas.
Within 2 miles, the terrain around Douglas has only modest variations in elevation — a maximum elevation change of 246 ft around an average of 4,009 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,142 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 7,218 ft.
The land around Douglas is covered by artificial surfaces (50%) and shrubs (36%) within 2 miles, shrubs (72%) within 10 miles, and shrubs (64%) and grassland (26%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- 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 Douglas (31.3446°, -109.5453°, elevation 4,009 ft), 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).