1. ASOS Mainpage
2. Download ASOS 1 minute interval data

Each month, the National Climatic Data Center provides an archive of one minute interval data from the ASOS sites in the United States. Unfortunately, the data format of this information is brutal to work with. Fortunately for you, the IEM processes this information and provides it for download here. The archive is available up until: 09 Jun 2023. There is a different interface to download the routine hourly observations from this network and for sites over the entire globe.

1. Select Station:

Select One or More or All stations in the network.

2. Timezone of Observations:

The timestamps used in the downloaded files will be set in the timezone you specify. UTC Time Central Standard/Daylight Time

3. Select Start/End Time:

If you select "Central Standard/Daylight Time" in #2 above, then these times you select for start and end time will be in CST/CDT as well. Otherwise, the default is UTC.

	Year	Month	Day	Hour	Minute
Start:	200020012002200320042005200620072008200920102011201220132014201520162017201820192020202120222023	JanFebMarAprMayJunJulAugSepOctNovDec	12345678910111213141516171819202122232425262728293031	0 UTC1 UTC2 UTC3 UTC4 UTC5 UTC6 UTC7 UTC8 UTC9 UTC10 UTC11 UTC12 UTC13 UTC14 UTC15 UTC16 UTC17 UTC18 UTC19 UTC20 UTC21 UTC22 UTC23 UTC	01234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859
End:	200020012002200320042005200620072008200920102011201220132014201520162017201820192020202120222023	JanFebMarAprMayJunJulAugSepOctNovDec	12345678910111213141516171819202122232425262728293031	0 UTC1 UTC2 UTC3 UTC4 UTC5 UTC6 UTC7 UTC8 UTC9 UTC10 UTC11 UTC12 UTC13 UTC14 UTC15 UTC16 UTC17 UTC18 UTC19 UTC20 UTC21 UTC22 UTC23 UTC	01234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859

4. Select Variables:

Air Temperature [F] Dew Point Temperature [F] Wind Speed [knots] Wind Direction 5 sec gust Wind Direction 5 sec gust Wind Speed [knots] Visibility 1 Coefficient Visibility 1 Night/Day Visibility 2 Coefficient Visibility 2 Night/Day Visibility 3 Coefficient Visibility 3 Night/Day Precip Type Code 1 minute precip [inches] Sensor 1 Station Pressure [inches] Sensor 2 Station Pressure [inches] Sensor 3 Station Pressure [inches]

5. Data Sampling?

Data is potentially available every minute, but you don't have to download it at that frequency. This setting does not bin the values, but rather filters based on your interval of choice. Every Minute Every 5 Minutes Every 10 Minutes Every 20 Minutes Every Hour

6. How to view?

The "Plot in Chart" option was removed here due to its poor performance. Please try Autoplot 211 instead.

Download to Disk View on-line

7. Data Delimitation:

How shall the output values be seperated?
Comma Space Tab

8. Include Station Latitude & Longitude values?

No Yes

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