KORD — CHICAGO O'HARE
Chicago O'Hare, IL, US · America/Chicago · 41.9602°, -87.9316° · 200m elevation
Daily METAR Observations
| Time | Temperature | Dew Point | Humidity | Wind | Wind Speed | Wind Gust | Pressure | Precip. | Condition |
|---|---|---|---|---|---|---|---|---|---|
| 12:51 AM | 71 °F 71.1 °F 22 °C 21.7 °C | 56 °F 55.9 °F 13 °C 13.3 °C | 59 % | E | 5 mph 4 kt 7 km/h | 0 mph 0 kt 0 km/h | 29.93 in | 0.0 in | Mostly Cloudy |
| METAR KORD 070551Z 09004KT 10SM BKN060 BKN090 BKN250 22/13 A2993 RMK AO2 SLP129 T02170133 10261 20211 403000211 51007 $ | |||||||||
| 1:51 AM | 70 °F 70 °F 21 °C 21.1 °C | 55 °F 55 °F 13 °C 12.8 °C | 59 % | NE | 6 mph 5 kt 9 km/h | 0 mph 0 kt 0 km/h | 29.92 in | 0.0 in | Mostly Cloudy |
| METAR KORD 070651Z 05005KT 10SM FEW060 SCT090 BKN250 21/13 A2992 RMK AO2 SLP125 T02110128 $ | |||||||||
| 2:51 AM | 68 °F 68 °F 20 °C 20 °C | 56 °F 55.9 °F 13 °C 13.3 °C | 65 % | NNE | 7 mph 6 kt 11 km/h | 0 mph 0 kt 0 km/h | 29.90 in | 0.0 in | Mostly Cloudy |
| METAR KORD 070751Z 03006KT 10SM SCT110 BKN250 20/13 A2990 RMK AO2 SLP120 T02000133 $ | |||||||||
| 3:51 AM | 68 °F 68 °F 20 °C 20 °C | 56 °F 55.9 °F 13 °C 13.3 °C | 65 % | NE | 8 mph 7 kt 13 km/h | 0 mph 0 kt 0 km/h | 29.92 in | 0.0 in | Mostly Cloudy |
| METAR KORD 070851Z 05007KT 10SM BKN110 BKN250 20/13 A2992 RMK AO2 SLP126 T02000133 55003 $ | |||||||||
| 4:51 AM | 68 °F 68 °F 20 °C 20 °C | 56 °F 55.9 °F 13 °C 13.3 °C | 65 % | NE | 7 mph 6 kt 11 km/h | 0 mph 0 kt 0 km/h | 29.94 in | 0.0 in | Mostly Cloudy |
| METAR KORD 070951Z 04006KT 10SM BKN080 BKN095 BKN250 20/13 A2994 RMK AO2 SLP133 T02000133 $ | |||||||||
| 5:51 AM | 67 °F 66.9 °F 19 °C 19.4 °C | 57 °F 57 °F 14 °C 13.9 °C | 71 % | ENE | 8 mph 7 kt 13 km/h | 0 mph 0 kt 0 km/h | 29.95 in | 0.0 in | Mostly Cloudy |
| METAR KORD 071051Z 06007KT 10SM SCT070 BKN085 BKN250 19/14 A2995 RMK AO2 SLP137 T01940139 $ | |||||||||
| 6:51 AM | 67 °F 66.9 °F 19 °C 19.4 °C | 58 °F 57.9 °F 14 °C 14.4 °C | 73 % | ENE | 7 mph 6 kt 11 km/h | 0 mph 0 kt 0 km/h | 29.96 in | 0.0 in | Mostly Cloudy |
| METAR KORD 071151Z 07006KT 10SM FEW070 BKN085 BKN250 19/14 A2996 RMK AO2 SLP142 T01940144 10217 20189 51016 $ | |||||||||
| 7:51 AM | 69 °F 69.1 °F 21 °C 20.6 °C | 59 °F 59 °F 15 °C 15 °C | 70 % | ENE | 7 mph 6 kt 11 km/h | 0 mph 0 kt 0 km/h | 29.98 in | 0.0 in | Mostly Cloudy |
| METAR KORD 071251Z 06006KT 10SM FEW085 BKN250 21/15 A2998 RMK AO2 SLP148 T02060150 $ | |||||||||
| 8:51 AM | 72 °F 72 °F 22 °C 22.2 °C | 60 °F 60.1 °F 16 °C 15.6 °C | 66 % | E | 9 mph 8 kt 15 km/h | 0 mph 0 kt 0 km/h | 29.99 in | 0.0 in | Mostly Cloudy |
| METAR KORD 071351Z 08008KT 10SM BKN250 22/16 A2999 RMK AO2 SLP151 T02220156 $ | |||||||||
| 9:51 AM | 77 °F 77 °F 25 °C 25 °C | 60 °F 60.1 °F 16 °C 15.6 °C | 56 % | E | 9 mph 8 kt 15 km/h | 0 mph 0 kt 0 km/h | 29.99 in | 0.0 in | Mostly Cloudy |
| METAR KORD 071451Z 08008KT 10SM BKN250 25/16 A2999 RMK AO2 SLP149 T02500156 50007 $ | |||||||||
| 10:51 AM | 81 °F 81 °F 27 °C 27.2 °C | 59 °F 59 °F 15 °C 15 °C | 47 % | E | 12 mph 10 kt 19 km/h | 21 mph 18 kt 33 km/h | 29.97 in | 0.0 in | Partly Cloudy |
| METAR KORD 071551Z 09010G18KT 10SM SCT250 27/15 A2997 RMK AO2 SLP143 T02720150 $ | |||||||||
| 11:51 AM | 82 °F 82 °F 28 °C 27.8 °C | 55 °F 55 °F 13 °C 12.8 °C | 40 % | E | 16 mph 14 kt 26 km/h | 0 mph 0 kt 0 km/h | 29.97 in | 0.0 in | Mostly Cloudy |
| METAR KORD 071651Z 09014KT 10SM BKN250 28/13 A2997 RMK AO2 SLP143 T02780128 $ | |||||||||
| 12:51 PM | 83 °F 82.9 °F 28 °C 28.3 °C | 54 °F 54 °F 12 °C 12.2 °C | 37 % | E | 15 mph 13 kt 24 km/h | 0 mph 0 kt 0 km/h | 29.97 in | 0.0 in | Mostly Cloudy |
| METAR KORD 071751Z 09013KT 10SM FEW075 BKN250 28/12 A2997 RMK AO2 SLP142 T02830122 10283 20194 56006 $ | |||||||||
| 1:51 PM | 82 °F 82 °F 28 °C 27.8 °C | 54 °F 54 °F 12 °C 12.2 °C | 38 % | ENE | 14 mph 12 kt 22 km/h | 0 mph 0 kt 0 km/h | 29.95 in | 0.0 in | Mostly Cloudy |
| METAR KORD 071851Z 07012KT 10SM FEW080 BKN250 28/12 A2995 RMK AO2 LTG DSNT S SLP138 OCNL LTG DSNT S-W CB DSNT S-W MOV N T02780122 $ | |||||||||
| 2:51 PM | 79 °F 79 °F 26 °C 26.1 °C | 56 °F 55.9 °F 13 °C 13.3 °C | 45 % | ENE | 13 mph 11 kt 20 km/h | 0 mph 0 kt 0 km/h | 29.94 in | 0.0 in | Overcast |
| METAR KORD 071951Z 06011KT 10SM SCT080 BKN240 OVC300 26/13 A2994 RMK AO2 SLP134 T02610133 $ | |||||||||
| 3:51 PM | 77 °F 77 °F 25 °C 25 °C | 57 °F 57 °F 14 °C 13.9 °C | 50 % | NE | 12 mph 10 kt 19 km/h | 0 mph 0 kt 0 km/h | 29.94 in | 0.0 in | Overcast |
| METAR KORD 072051Z 05010KT 10SM SCT070 BKN140 BKN240 OVC300 25/14 A2994 RMK AO2 SLP135 T02500139 55008 $ | |||||||||
| 4:51 PM | 75 °F 75 °F 24 °C 23.9 °C | 56 °F 55.9 °F 13 °C 13.3 °C | 52 % | ENE | 9 mph 8 kt 15 km/h | 0 mph 0 kt 0 km/h | 29.96 in | 0.0 in | Overcast |
| METAR KORD 072151Z 06008KT 10SM FEW070 BKN100 BKN230 OVC300 24/13 A2996 RMK AO2 LTG DSNT SW SLP141 T02390133 $ | |||||||||
| 5:51 PM | 72 °F 72 °F 22 °C 22.2 °C | 56 °F 55.9 °F 13 °C 13.3 °C | 57 % | NE | 6 mph 5 kt 9 km/h | 0 mph 0 kt 0 km/h | 29.97 in | 0.01 in | Light Rain |
| METAR KORD 072251Z 05005KT 10SM -RA SCT055 BKN070 BKN095 BKN240 OVC300 22/13 A2997 RMK AO2 RAB22 SLP145 P0000 T02220133 $ | |||||||||
| 6:51 PM | 70 °F 70 °F 21 °C 21.1 °C | 59 °F 59 °F 15 °C 15 °C | 68 % | E | 5 mph 4 kt 7 km/h | 0 mph 0 kt 0 km/h | 29.98 in | 0.01 in | Light Rain |
| METAR KORD 072351Z 10004KT 10SM -RA SCT055 BKN080 BKN100 BKN180 OVC250 21/15 A2998 RMK AO2 SLP147 P0000 60000 T02110150 10283 20211 51011 $ | |||||||||
| 7:51 PM | 70 °F 70 °F 21 °C 21.1 °C | 57 °F 57 °F 14 °C 13.9 °C | 64 % | E | 6 mph 5 kt 9 km/h | 0 mph 0 kt 0 km/h | 29.94 in | 0.01 in | Light Rain |
| METAR KORD 080051Z 08005KT 10SM -RA FEW055 SCT085 BKN130 OVC250 21/14 A2994 RMK AO2 SLP136 P0000 T02110139 $ | |||||||||
| 8:51 PM | 70 °F 70 °F 21 °C 21.1 °C | 55 °F 55 °F 13 °C 12.8 °C | 59 % | NNE | 9 mph 8 kt 15 km/h | 0 mph 0 kt 0 km/h | 29.95 in | 0.01 in | Mostly Cloudy |
| METAR KORD 080151Z 02008KT 10SM FEW055 FEW075 BKN140 BKN190 OVC250 21/13 A2995 RMK AO2 RAE18 SLP138 P0000 T02110128 $ | |||||||||
| 9:51 PM | 68 °F 68 °F 20 °C 20 °C | 56 °F 55.9 °F 13 °C 13.3 °C | 65 % | ENE | 9 mph 8 kt 15 km/h | 0 mph 0 kt 0 km/h | 29.97 in | 0.0 in | Mostly Cloudy |
| METAR KORD 080251Z 06008KT 10SM FEW055 FEW075 SCT130 BKN180 OVC250 20/13 A2997 RMK AO2 SLP143 60000 T02000133 55003 $ | |||||||||
| 10:51 PM | 67 °F 66.9 °F 19 °C 19.4 °C | 56 °F 55.9 °F 13 °C 13.3 °C | 68 % | NNE | 7 mph 6 kt 11 km/h | 0 mph 0 kt 0 km/h | 29.96 in | 0.0 in | Overcast |
| METAR KORD 080351Z 03006KT 10SM FEW055 BKN180 OVC220 19/13 A2996 RMK AO2 SLP142 T01940133 $ | |||||||||
| 11:51 PM | 67 °F 66.9 °F 19 °C 19.4 °C | 56 °F 55.9 °F 13 °C 13.3 °C | 68 % | ENE | 5 mph 4 kt 7 km/h | 0 mph 0 kt 0 km/h | 29.96 in | 0.0 in | Mostly Cloudy |
| METAR KORD 080451Z 06004KT 10SM BKN065 BKN075 BKN220 19/13 A2996 RMK AO2 SLP142 T01940133 $ | |||||||||
Time Series
Summary
| Temperature (°F) Temperature (°C) | Actual | |
| High Temp | ||
| Low Temp | ||
| Day Average Temp | ||
| Precipitation (in) | Actual | |
| Precipitation | ||
| Dew Point (°F) Dew Point (°C) | Actual | |
| High | ||
| Low | ||
| Average | ||
| Humidity (%) | Actual | |
| Average Humidity | ||
| Wind (mph) Wind (kt) Wind (km/h) | Actual | |
| Max Wind Speed | ||
| Max Wind Gust | ||
| Visibility | ||
| Pressure (in) | Actual | |
| Average Pressure | ||
| Astronomy | Day Length | Rise / Set |
| Actual Time | 15h 11m | 5:14 AM / 8:26 PM |
| Civil Twilight | 4:42 AM / 8:58 PM | |
| Nautical Twilight | 3:58 AM / 9:42 PM | |
| Astronomical Twilight | 3:06 AM / 10:34 PM | |
| Moon: Last Quarter | ||
Methodology
Day Boundaries & Time
A "day" is defined as midnight to midnight (00:00:00 through 23:59:59) in the station's local time, using the IANA timezone assigned to each station (e.g. America/Chicago, Europe/London). Daylight Saving Time transitions are respected automatically — when a station's local clocks spring forward or fall back, the UTC boundaries of the day shift accordingly. This means a "day" in the spring DST transition is 23 hours, and in the fall transition it is 25 hours. All observations are stored internally in UTC and converted to local time for display.
Temperature
The FAA reports temperature in degrees Celsius. Values are stored to one decimal place — if a source value has additional precision, it is rounded on storage. Fahrenheit values are computed as °F = °C × 9/5 + 32. All temperatures are displayed as whole numbers (rounded to the nearest integer) in both Celsius and Fahrenheit. High and low temperatures are the maximum and minimum observed values for the day. The day average is the arithmetic mean of all observed temperatures, rounded to the nearest whole number.
Dew Point & Relative Humidity
Dew point is stored and displayed using the same rounding method as temperature (whole numbers). Relative humidity is not reported directly in METARs — it is calculated from the temperature and dew point using the Magnus formula: RH = 100 × exp[(17.27 × Td)/(237.7 + Td) − (17.27 × T)/(237.7 + T)], where T is temperature and Td is dew point, both in °C. The result is rounded to the nearest whole percent and clamped between 0% and 100%.
Wind
Wind direction is reported in degrees true (0–360). The compass direction shown (N, NNE, NE, etc.) divides the compass into 16 sectors of 22.5° each. Variable winds (reported as "VRB" in the METAR) are displayed as "CALM". Wind speed is reported in knots (integer). Miles per hour is computed as mph = kt × 1.15078 and kilometers per hour as km/h = kt × 1.852, both displayed as whole numbers. Wind gust is shown only when the METAR includes a gust value.
Pressure
The altimeter setting is reported in inches of mercury (inHg) to two decimal places. This is the station pressure corrected to sea level and is the value displayed. When the METAR also includes sea level pressure in millibars, that value is used in daily summary calculations.
Precipitation
Precipitation accumulations (1-hour, 3-hour, 6-hour, and 24-hour) are included when reported by the station. A value of 0.0005 inches represents trace precipitation in the FAA convention. The daily total in the summary is the sum of all 1-hour accumulations that exceed trace. Not all stations report precipitation data.
Sky Condition & Weather
The "Condition" column is derived from two METAR fields. If a weather phenomena code is present (e.g. RA for rain, SN for snow, FG for fog, TSRA for thunderstorms), it takes priority and the intensity prefix (- for light, + for heavy) is included. When no active weather is reported, the condition is derived from the highest sky cover layer: CLR/SKC/FEW = Fair, SCT = Partly Cloudy, BKN = Mostly Cloudy, OVC = Overcast.