| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 15°F | 40°F | 26°F | 1.2" |
| February | 20°F | 48°F | 32°F | 0.8" |
| March | 25°F | 59°F | 40°F | 1.8" |
| April | 32°F | 63°F | 46°F | 4.8" |
| May | 41°F | 68°F | 53°F | 7.4" |
| June | 53°F | 85°F | 69°F | 2.8" |
| July | 58°F | 90°F | 73°F | 2.7" |
| August | 54°F | 87°F | 70°F | 3.0" |
| September | 48°F | 82°F | 64°F | 4.3" |
| October | 37°F | 69°F | 51°F | 2.6" |
| November | 23°F | 54°F | 37°F | 2.5" |
| December | 13°F | 41°F | 26°F | 0.8" |
| Index | Crook | Colorado | National |
| Air quality index | 19 | 38 | 42 |
| Pollution index | 303,187 | 2,068,342 | 2,726,193 |
| Measurement | Total |
| Days measured | 113 |
| Days with good air quality | 110 |
| Days with moderate air quality | 3 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.005% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Sedgwick, CO | 163 | 19 | 62.0% |
| Haxtun, CO | 804 | 19 | 62.0% |
| Fleming, CO | 660 | 19 | 62.0% |
| Lorenzo, NE | 20 | 19 | 62.0% |
| Iliff, CO | 345 | 19 | 62.0% |
| Crook, CO | 166 | 19 | 62.0% |
| City | Population | Air Quality Index | National Avg. |
| Movico, AL | 166 | 42 | 16.0% |
| Sierraville, CA | 166 | 44 | 12.0% |
| Wawona, CA | 166 | 50 | = 100 |
| Bethune, CO | 166 | 45 | 10.0% |
| Olds, IA | 166 | 32 | 36.0% |
| Crook, CO | 166 | 19 | 62.0% |
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