WU shows different temperature than MyAcuRite dashboard

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  • Updated 8 months ago
MyAcuRite and my display are spot on.  However, WU show my temperature several degrees higher even though it states that it was updated within a few seconds.  I have calibrated both the display and the MyAcuRite to be 2.5 degrees cooler per other thermometers located in the same place.  

Any solutions to this problem?  Is this a delay at WU?  Is this the same as the "gaps" I have read about?

Thanks in advance!
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Jeffrey

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Posted 1 year ago

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AcuRite Jennifer

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Hello Jeffrey,

Any calibrations that are entered on the display or in My Acurite will not transfer to Weather Underground. This is because the readings from the sensor are sent directly to Weather Underground and do not go to My AcuRite first. This allows for the rapid fire updates on Weather Underground. The information on Weather Underground and your display will update every 32-36 seconds, and My AcuRite updates every 5 minutes. 
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Jeffrey

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I am also struggling with accurate temperatures from the 5-1.  I recently got the upgraded dual solar powered fan.  This helped with the temperature spikes in the morning and evening but I am still consistently about 2-3 degrees hotter from the 5-1 sensor than the other 3 thermometers near the 5-1 (the others are all in the shade as they have no fan).  The temperatures all even out between thermometers at night or on cloudy days, so this has to do with the effectiveness of the fan.  The fan works fine and it was just installed a couple days ago, so not insect problem.  For this reason I calibrated the 5-1 2.5 degrees cooler.  While acceptable for the daily high, this is not an effective solution for the daily low as it is now almost 3 degrees cooler than any other thermometer near the 5-1 or with other stations near my house.  

The 5-1 is on a post in a grassy area in full sun about 8 feet off the ground.

Thanks in advance!

PS... if no solution, which wireless standalone thermometer would be compatible with the 5-1 and the internet bridge\MyAcurite.  I would simply put this in a shady place and call it good.
(Edited)
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AcuRite Jennifer

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Hello Jeffrey,

With no calibrations on the display what does the outdoor temperature read, and what do you think it should read? When the sun hits the solar panel do you hear a slight hum coming from the sensor? When comparing temperature, humidity or other environmental readings against other sources to determine accuracy, the comparative source MUST be in the exact same location where the original measurement is taken. 

Information on the television, radio, computer, or mobile app is NOT a valid source for comparison, because environmental factors fluctuate a great deal between different locations. Data from these sources may be for locations that are several miles away from where you're taking a reading.

When testing a product against another product for accuracy, be sure to allow products to sit undisturbed (without handling) side by side for a minimum of 30 minutes to allow the products to acclimate to the environmental conditions. 1-8 hours is ideal for humidity testing. Also be sure to take into account the accuracy standard/tolerance for different products.
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Jon008

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Jeffrey,
From what you have posted, I would say there is nothing at all wrong with your acurite. This is the way the sensor works. If you had the other thermometers in the shade, then they will read cooler than one that is located in the sun. If you put an inverted bowl painted white over the top of one of your 3 other sensors and put it in the sun, it would read 2 F more at least. This is the way you take an accurate temperature. Taking a temperature shaded by trees will result in cooler outputs.
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Jeffrey

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What?!?!  So you are saying that a thermometer with a fan in the sun will read hotter that a thermometer nearby in the shade and I just need to accept that?  How is that accurate or scientific?  With a 5-1 I have no choice but to put it in the sun if I want accurate rainfall, wind speed and wind direction readings.  All my life I have been told that accurate temperature readings are taken in the shade not in the sun.  These are the OFFICIAL temperature readings.  I have made the assumption that the way the 5-1 gets away with placing the sensor in the sun is due to the fan.  Why even bother with a fan if the response is..."that's just the way they work when you put it in the sun.  They are going to read hotter"?
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Steve Barreres

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I have have this problem too.  I have analyzed the issue fully and the problem is the material that is used on the 5 in 1 case.  The infrared energy from the sun passes thru the white translucent plastic.  We all know what happens with our cars in the summer with the sun.  Infrared energy enters the car and warms anything that is shines on.  This heat is now trapped in side the car.  Now the fan in the 5 in 1 will be drawing in new air, but it has to overcome the build up that the sun is causing.

If the plastic were opaque to infrared, problem gone.  I have purchased some reflective Mylar, space blanket material and intend to glue it to the exterior areas to stop the infrared from entering the sensors.  Then the air being drawn past the temperature sensor by the fan will be an accurate air temperature, rather that the higher temps we all see during solar infrared heating.  We could place the unit on the north side of our homes in the shade.  But you would suffer wind speed measurement errors due to that. 
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AcuRite Jennifer

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Hello Steve,

This is an older post from July that you are replying to. The reason people get different readings on their My AcuRite and Weather Underground are update intervals. My AcuRite updates in 5 minute intervals and Weather Underground updates every 36 seconds.
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Jeffrey

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To respond to Jennifer, with no calibration changes, the maximum temperature is anywhere between 4-7 degrees hotter than the other 3 thermometers nearby.  However, the minimum temperatures are spot on.  Logically this would imply that the sun is the problem since the fan is brand new and verified to be working fine (I just checked this morning).  

The other thermometers are within 25 feet and are all in the shade at all times.  Two are analog (mercury and alcohol) and one is digital.  The 3 non-Acurite thermometers all agree within +/-1 degree.  I moved my 5-1 into the shade next to the other digital thermometer and guess what...it is now consistent with the other 3 thermometers!

I realize that there are micro climates so I usually do not compare my readings to the National Weather Service which takes their data from the hottest place in our area (the local airport).  I live out of the urban area in a more rural, always cooler, location.  However, the Acurite 5-1, on a hot summer day, is always hotter than the NWS highs.  This, in addition to the data I have gathered from 25 feet away, is just another data point that suggests the 5-1 is not an accurate thermometer.  

If you can show me chapter and verse in a scientific publication, that it is acceptable (as Jon008 believes) to have higher temperatures (do we know how much higher?) with aspirated thermometers in the sun than non-aspirated thermometers in the shade, then I will keep my peace.  However, I can't see how this could be true given the host of variables that would introduce.  Weather is a science, not an art-form for individual interpretation.

Finally, if there is no solution to this problem...say it is just poor engineering, my last question is does Acurite have a standalone, wireless thermometer that is compatible with my #01010 and Aculink Bridge that I can purchase to put in the shade?  is model #02059M compatible...at least with the Aculink (maybe not with the #01010?

Thanks in advance

Jeff
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Steve Barreres

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Jeff,  Contact me to discuss this issue.  How making a retro kit for all of the unhappy customers.  Leave a Face Book message.

Steve Barreres 
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AcuRite Jennifer

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Hello Steve,

This is an older post the last post was back in July, however Jeffrey should get an email stating you commented on the post. Please let us know if there is anything we can do for you.
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Jeffrey

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Jennifer,

Can you reply to the last post?
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AcuRite Rachell, Employee

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Hello Jeffrey,

We would recommend comparing the unit to a unit at the same exact height and location as stated above.  If you put the sensor in the shade it will read the same as the other thermometers however, the sensor is designed to be in the sunlight which is why it has the fan.  The fan's purpose is to keep air flow moving through the sensor to allow for accurate temperature readings when the sun is hitting the sensor.  When comparing a unit in the sun to a unit in the shade they will read different.  If you are standing in the sun and wind is blowing on you, you are still going to feel warmer then you would standing in the shade.  This is the same for the sensor. The sensor is reading the ambient temperature where it is mounted. 
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Jeffrey

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I guess what I am having a problem with is that my sensor in the sun with a fan is reading temps 5-7 degrees hotter than anyone else in the close vicinity I live in, hotter than NWS and hotter than the 3 thermometers in the shade in  very close proximity and height.  Isn't the standard to measure temperature in the shade (or the equivalent, which I assume is in the sun with a fan)?

Bottom line is, I don't want to know what the temperature is "in the sun with wind blowing on me", I want to know what the "correct" (meaning the accepted, accurate and official) temperature is +/- 2 degrees.  
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AcuRite Rachell, Employee

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The 02059 sensor is compatible with My AcuRite.  Temperatures will vary if a product is in the shade or in the sun as they are two different locations. The sensor should be reading the accurate ambient temperature where you have it mounted. This is why we say to compare to the same height and location.  If you were to take the sensor from the shade and put it in the sun it will read higher.  If you havfe calibrations on the display and My AcuRite the true temperature is not being displayed.  

If you are reading incorrect temperatures during the day we would recommend opening the sensor and holding the top half in the sun to see if the fan is turning on by itself.  If the fan is not functioning as designed, the wind cup assembly will need to be replaced.  Can you provide us with temperature readings that are not calibrated at different times during the day so we can compare the readings to My AcuRite?   For example at 9:00AM by display reads ___, at noon my display reads ___, and at 6:00PM my display reads ___.  Thank you.  
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Jeffrey

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Please respond to my last paragraph regarding compatibility with Aculink bridge using a separate temperature sensor.