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Humidity Data Access and Tools

NASA’s humidity data range from hourly primary forcing data to modeled data based on measurements from high-altitude aircraft. Our datasets and tools help users find and integrate the data they need to see how humidity influences weather, ecosystems, and how we live our lives.

Humidity Datasets

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Dataset Version Platform Instrument Temporal Extent Spatial Extent Spatial Resolution Data Format
MERRA-2 tavg3_3d_cld_Nv: 3d,3-Hourly,Time-Averaged,Model-Level,Assimilation,Cloud Diagnostics 0.625 x 0.5 degree V5.12.4 (M2T3NVCLD) 5.12.4 MERRA-2 NOT APPLICABLE 1980-01-01 to Present

N: 90 S: -90 E: 180 W: -180

0.625 Decimal Degrees x 0.5 Decimal Degrees
MERRA-2 tavg3_3d_qdt_Np: 3d,3-Hourly,Time-Averaged,Pressure-Level,Assimilation,Moist Tendencies 0.625 x 0.5 degree V5.12.4 (M2T3NPQDT) 5.12.4 MERRA-2 NOT APPLICABLE 1980-01-01 to Present

N: 90 S: -90 E: 180 W: -180

0.625 Decimal Degrees x 0.5 Decimal Degrees
MERRA-2 tavgC_3d_ltm_Np: 3d, Long Term Mean 3-Dimensional Meteorological Fields based on 1991-2020 V2 (M2TCNPLTM) 2 MERRA-2 NOT APPLICABLE 1991-01-01 to 2020-12-31

N: 90 S: -90 E: 180 W: -180

0.625 Decimal Degrees x 0.5 Decimal Degrees
MERRA-2 tavgC_3d_ltm_Np: 3d, Long Term Mean 3-Dimensional Meteorological Fields V1 (M2TCNPLTM) 1 MERRA-2 NOT APPLICABLE 1981-01-01 to 2010-12-31

N: 90 S: -90 E: 180 W: -180

0.625 Decimal Degrees x 0.5 Decimal Degrees
MERRA-2 tavgM_2d_flx_Nx: 2d,Monthly mean,Time-Averaged,Single-Level,Assimilation,Surface Flux Diagnostics 0.625 x 0.5 degree V5.12.4 (M2TMNXFLX) 5.12.4 MERRA-2 NOT APPLICABLE 1980-01-01 to Present

N: 90 S: -90 E: 180 W: -180

0.625 Decimal Degrees x 0.5 Decimal Degrees
MERRA-2 tavgM_2d_ocn_Nx: 2d,Monthly mean,Time-Averaged,Single-Level,Assimilation,Ocean Surface Diagnostics 0.625 x 0.5 degree V5.12.4 (M2TMNXOCN) 5.12.4 MERRA-2 NOT APPLICABLE 1980-01-01 to Present

N: 90 S: -90 E: 180 W: -180

0.625 Decimal Degrees x 0.5 Decimal Degrees
MERRA-2 tavgM_2d_slv_Nx: 2d,Monthly mean,Time-Averaged,Single-Level,Assimilation,Single-Level Diagnostics 0.625 x 0.5 degree V5.12.4 (M2TMNXSLV) 5.12.4 MERRA-2 NOT APPLICABLE 1980-01-01 to Present

N: 90 S: -90 E: 180 W: -180

0.625 Decimal Degrees x 0.5 Decimal Degrees
MERRA-2 tavgM_3d_cld_Np: 3d,Monthly mean,Time-Averaged,Pressure-Level,Assimilation,Cloud Diagnostics 0.625 x 0.5 degree V5.12.4 (M2TMNPCLD) 5.12.4 MERRA-2 NOT APPLICABLE 1980-01-01 to Present

N: 90 S: -90 E: 180 W: -180

0.625 Decimal Degrees x 0.5 Decimal Degrees
MERRA-2 tavgM_3d_qdt_Np: 3d,Monthly mean,Time-Averaged,Pressure-Level,Assimilation,Moist Tendencies 0.625 x 0.5 degree V5.12.4 (M2TMNPQDT) 5.12.4 MERRA-2 NOT APPLICABLE 1980-01-01 to Present

N: 90 S: -90 E: 180 W: -180

0.625 Decimal Degrees x 0.5 Decimal Degrees
MERRA-2 tavgU_2d_flx_Nx: 2d,diurnal,Time-Averaged,Single-Level,Assimilation,Surface Flux Diagnostics 0.625 x 0.5 degree V5.12.4 (M2TUNXFLX) 5.12.4 MERRA-2 NOT APPLICABLE 1980-01-01 to Present

N: 90 S: -90 E: 180 W: -180

0.625 Decimal Degrees x 0.5 Decimal Degrees
MERRA-2 tavgU_2d_ocn_Nx: 2d,diurnal,Time-Averaged,Single-Level,Assimilation,Ocean Surface Diagnostics 0.625 x 0.5 degree V5.12.4 (M2TUNXOCN) 5.12.4 MERRA-2 NOT APPLICABLE 1980-01-01 to Present

N: 90 S: -90 E: 180 W: -180

0.625 Decimal Degrees x 0.5 Decimal Degrees
MERRA-2 tavgU_2d_slv_Nx: 2d,diurnal,Time-Averaged,Single-Level,Assimilation,Single-Level Diagnostics 0.625 x 0.5 degree V5.12.4 (M2TUNXSLV) 5.12.4 MERRA-2 NOT APPLICABLE 1980-01-01 to Present

N: 90 S: -90 E: 180 W: -180

0.625 Decimal Degrees x 0.5 Decimal Degrees
MERRA-2 tavgU_3d_cld_Np: 3d,diurnal,Time-Averaged,Pressure-Level,Assimilation,Cloud Diagnostics 0.625 x 0.5 degree V5.12.4 (M2TUNPCLD) 5.12.4 MERRA-2 NOT APPLICABLE 1980-01-01 to Present

N: 90 S: -90 E: 180 W: -180

0.625 Decimal Degrees x 0.5 Decimal Degrees
MERRA-2 tavgU_3d_qdt_Np: 3d,diurnal,Time-Averaged,Pressure-Level,Assimilation,Moist Tendencies 0.625 x 0.5 degree V5.12.4 (M2TUNPQDT) 5.12.4 MERRA-2 NOT APPLICABLE 1980-01-01 to Present

N: 90 S: -90 E: 180 W: -180

0.625 Decimal Degrees x 0.5 Decimal Degrees
MetOp-A ASCAT ESDR Level 2 Ancillary Ocean Surface Fields Version 1.1 1.1 MODELS, METOP-A Computer, ASCAT 2007-01-01 to 2014-04-01

N: 90 S: -90 E: 180 W: -180

12.5 Kilometers x 12.5 Kilometers netCDF-4
MetOp-B ASCAT ESDR Level 2 Ancillary Ocean Surface Fields Version 1.1 1.1 MODELS, METOP-B Computer, ASCAT 2013-08-01 to 2022-05-31

N: 90 S: -90 E: 180 W: -180

12.5 Kilometers x 12.5 Kilometers netCDF-4
Millersville University Upper Air Radiosondes IMPACTS V1 1 GROUND STATIONS RADIOSONDES 2022-01-16 to 2023-02-28

N: 43.097 S: 39.927 E: -72.503 W: -76.455

ASCII
MLS/Aura Level 2 Diagnostics, Geophysical Parameter Grid V005 (ML2DGG) 005 2004-08-02 to Present
MLS/Aura Level 2 Diagnostics, Geophysical Parameter Grid V006 (ML2DGG) 006 Aura MLS 2004-08-02 to Present

N: 82 S: -82 E: 180 W: -180

MLS/Aura Level 2 Relative Humidity With Respect To Ice V005 (ML2RHI) 005 Aura MLS 2004-08-02 to Present

N: 82 S: -82 E: 180 W: -180

MLS/Aura Level 2 Relative Humidity With Respect To Ice V006 (ML2RHI) 006 Aura MLS 2004-08-02 to Present

N: 82 S: -82 E: 180 W: -180

MLS/Aura Level 3 Daily Binned Relative Humidity With Respect To Ice (RHI) on Assorted Grids V004 (ML3DBRHI) 004 Aura MLS 2004-08-02 to Present

N: 82 S: -82 E: 180 W: -180

5 Decimal Degrees x 4 Decimal Degrees
MLS/Aura Level 3 Daily Binned Relative Humidity With Respect To Ice (RHI) on Assorted Grids V005 (ML3DBRHI) 005 Aura MLS 2004-08-02 to Present

N: 82 S: -82 E: 180 W: -180

5 Decimal Degrees x 4 Decimal Degrees
MLS/Aura Level 3 Daily Binned Relative Humidity With Respect To Ice (RHI) on Zonal and Similar Grids V004 (ML3DZRHI) 004 Aura MLS 2004-08-02 to Present

N: 82 S: -82 E: 180 W: -180

MLS/Aura Level 3 Daily Binned Relative Humidity With Respect To Ice (RHI) on Zonal and Similar Grids V005 (ML3DZRHI) 005 Aura MLS 2004-08-02 to Present

N: 82 S: -82 E: 180 W: -180

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Featured Humidity Observation Method: MLS

The Microwave Limb Sounder (MLS) instrument is carried aboard the Aqua satellite and acquires measurements globally day and night. The MLS makes measurements of atmospheric composition, temperature, humidity and cloud ice that are needed to learn more about weather, climate, and air quality.

Learn More About MLS
image collage of satellite data images of Earth

MLS Near Real-Time Data

Near real-time atmosphere, temperature, humidity, and cloud ice data from the Microwave Limb Sounder (MLS) are available through NASA's Land, Atmosphere Near real-time Capability for Earth observation (LANCE).
image of MLS SIPS data over Antarctica

MLS Products Available in GIBS

In coordination with the Microwave Limb Sounder (MLS) team, we now have several MLS products available through the GIBS image access APIs.

Humidity Data Tools

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